<?xml version="1.0" encoding="us-ascii"?>
<!-- DFS ActiveDisclosure(SM) XBRL Schema Document - http://www.dfsco.com/financial-services/ -->
<!-- Creation Date      : 2017-03-06T22:53:21.5969775+00:00 -->
<!-- Version            : 2.4.1.13 -->
<!-- Package ID         : 92178DA4EB4905B2D22DBFD7E82F9DB8-0001590877-001611 -->
<!-- Copyright (c) 2017 Donnelley Financial, LLC. All Rights Reserved. -->
<schema xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric" xmlns:num="http://www.xbrl.org/dtr/type/numeric" xmlns:us-types="http://fasb.org/us-types/2016-01-31" xmlns:stpr="http://xbrl.sec.gov/stpr/2011-01-31" xmlns:naics="http://xbrl.sec.gov/naics/2011-01-31" xmlns:sic="http://xbrl.sec.gov/sic/2011-01-31" xmlns:invest="http://xbrl.sec.gov/invest/2013-01-31" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:us-gaap="http://fasb.org/us-gaap/2016-01-31" xmlns:dei="http://xbrl.sec.gov/dei/2014-01-31" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:country="http://xbrl.sec.gov/country/2016-01-31" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:currency="http://xbrl.sec.gov/currency/2016-01-31" xmlns:rgnx="http://regenxbio.com/20161231" xmlns:exch="http://xbrl.sec.gov/exch/2016-01-31" attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://regenxbio.com/20161231" xmlns="http://www.w3.org/2001/XMLSchema">
  <import schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" namespace="http://www.xbrl.org/2003/instance" />
  <import schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" namespace="http://www.xbrl.org/2003/linkbase" />
  <import schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd" namespace="http://xbrl.org/2005/xbrldt" />
  <import schemaLocation="http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd" namespace="http://www.xbrl.org/dtr/type/numeric" />
  <import schemaLocation="http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd" namespace="http://www.xbrl.org/dtr/type/non-numeric" />
  <import schemaLocation="http://xbrl.fasb.org/us-gaap/2016/elts/us-types-2016-01-31.xsd" namespace="http://fasb.org/us-types/2016-01-31" />
  <import schemaLocation="http://xbrl.fasb.org/us-gaap/2016/elts/us-gaap-2016-01-31.xsd" namespace="http://fasb.org/us-gaap/2016-01-31" />
  <import schemaLocation="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd" namespace="http://xbrl.sec.gov/dei/2014-01-31" />
  <import schemaLocation="http://xbrl.sec.gov/country/2016/country-2016-01-31.xsd" namespace="http://xbrl.sec.gov/country/2016-01-31" />
  <import schemaLocation="http://xbrl.sec.gov/currency/2016/currency-2016-01-31.xsd" namespace="http://xbrl.sec.gov/currency/2016-01-31" />
  <import schemaLocation="http://xbrl.sec.gov/exch/2016/exch-2016-01-31.xsd" namespace="http://xbrl.sec.gov/exch/2016-01-31" />
  <import schemaLocation="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd" namespace="http://xbrl.sec.gov/invest/2013-01-31" />
  <import schemaLocation="http://xbrl.sec.gov/naics/2011/naics-2011-01-31.xsd" namespace="http://xbrl.sec.gov/naics/2011-01-31" />
  <import schemaLocation="http://xbrl.sec.gov/sic/2011/sic-2011-01-31.xsd" namespace="http://xbrl.sec.gov/sic/2011-01-31" />
  <import schemaLocation="http://xbrl.sec.gov/stpr/2011/stpr-2011-01-31.xsd" namespace="http://xbrl.sec.gov/stpr/2011-01-31" />
  <annotation>
    <appinfo>
      <link:roleType id="TemplateLink" roleURI="http://regenxbio.com/20161231/role/TemplateLink" xmlns:link="http://www.xbrl.org/2003/linkbase">
        <link:definition>00000 - Document - Template Link</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="rgnx-20161231_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:title="Calculation Links, all" xlink:type="simple" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="rgnx-20161231_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:title="Definition Links, all" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="rgnx-20161231_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:title="Label Links, all" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="rgnx-20161231_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:title="Presentation Links, all" xlink:type="simple" />
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DocumentDocumentAndEntityInformation" id="Role_DocumentDocumentAndEntityInformation">
        <link:definition>100000 - Document - Document and Entity Information</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/StatementBalanceSheets" id="Role_StatementBalanceSheets">
        <link:definition>100010 - Statement - Balance Sheets</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/StatementBalanceSheetsParenthetical" id="Role_StatementBalanceSheetsParenthetical">
        <link:definition>100020 - Statement - Balance Sheets (Parenthetical)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/StatementStatementsOfOperationsAndComprehensiveLoss" id="Role_StatementStatementsOfOperationsAndComprehensiveLoss">
        <link:definition>100030 - Statement - Statements of Operations and Comprehensive Loss</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/StatementStatementsOfOperationsAndComprehensiveLossParenthetical" id="Role_StatementStatementsOfOperationsAndComprehensiveLossParenthetical">
        <link:definition>100040 - Statement - Statements of Operations and Comprehensive Loss (Parenthetical)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/StatementStatementsOfConvertiblePreferredStockAndPreferredUnitsAndStockholdersAndMembersEquityDeficit" id="Role_StatementStatementsOfConvertiblePreferredStockAndPreferredUnitsAndStockholdersAndMembersEquityDeficit">
        <link:definition>100050 - Statement - Statements of convertible preferred stock and preferred units, and stockholders&apos; and members&apos; equity (deficit)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/StatementStatementsOfConvertiblePreferredStockAndPreferredUnitsAndStockholdersAndMembersEquityDeficitParenthetical" id="Role_StatementStatementsOfConvertiblePreferredStockAndPreferredUnitsAndStockholdersAndMembersEquityDeficitParenthetical">
        <link:definition>100060 - Statement - Statements of convertible preferred stock and preferred units, and stockholders&apos; and members&apos; equity (deficit) (Parenthetical)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/StatementStatementsOfCashFlows" id="Role_StatementStatementsOfCashFlows">
        <link:definition>100070 - Statement - Statements of Cash Flows</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureNatureOfBusiness" id="Role_DisclosureNatureOfBusiness">
        <link:definition>100080 - Disclosure - Nature of Business</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPolicies" id="Role_DisclosureSummaryOfSignificantAccountingPolicies">
        <link:definition>100090 - Disclosure - Summary of Significant Accounting Policies</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureMarketableSecurities" id="Role_DisclosureMarketableSecurities">
        <link:definition>100100 - Disclosure - Marketable Securities</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureFairValueOfFinancialInstruments" id="Role_DisclosureFairValueOfFinancialInstruments">
        <link:definition>100110 - Disclosure - Fair Value of Financial Instruments</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosurePropertyAndEquipmentNet" id="Role_DisclosurePropertyAndEquipmentNet">
        <link:definition>100120 - Disclosure - Property and Equipment, Net</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureCommitmentsAndContingencies" id="Role_DisclosureCommitmentsAndContingencies">
        <link:definition>100130 - Disclosure - Commitments and Contingencies</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureCapitalization" id="Role_DisclosureCapitalization">
        <link:definition>100140 - Disclosure - Capitalization</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureSignificantAgreements" id="Role_DisclosureSignificantAgreements">
        <link:definition>100150 - Disclosure - Significant Agreements</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureStockBasedCompensation" id="Role_DisclosureStockBasedCompensation">
        <link:definition>100160 - Disclosure - Stock-based Compensation</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureRetirementPlan" id="Role_DisclosureRetirementPlan">
        <link:definition>100170 - Disclosure - Retirement Plan</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureIncomeTaxes" id="Role_DisclosureIncomeTaxes">
        <link:definition>100180 - Disclosure - Income Taxes</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureRelatedPartyTransactions" id="Role_DisclosureRelatedPartyTransactions">
        <link:definition>100190 - Disclosure - Related Party Transactions</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureNetLossPerShare" id="Role_DisclosureNetLossPerShare">
        <link:definition>100200 - Disclosure - Net Loss Per Share</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureSupplementalDisclosures" id="Role_DisclosureSupplementalDisclosures">
        <link:definition>100210 - Disclosure - Supplemental Disclosures</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureSelectedQuarterlyFinancialInformationUnaudited" id="Role_DisclosureSelectedQuarterlyFinancialInformationUnaudited">
        <link:definition>100220 - Disclosure - Selected Quarterly Financial Information (Unaudited)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies" id="Role_DisclosureSummaryOfSignificantAccountingPoliciesPolicies">
        <link:definition>100230 - Disclosure - Summary of Significant Accounting Policies (Policies)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesTables" id="Role_DisclosureSummaryOfSignificantAccountingPoliciesTables">
        <link:definition>100240 - Disclosure - Summary of Significant Accounting Policies (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureMarketableSecuritiesTables" id="Role_DisclosureMarketableSecuritiesTables">
        <link:definition>100250 - Disclosure - Marketable Securities (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureFairValueOfFinancialInstrumentsTables" id="Role_DisclosureFairValueOfFinancialInstrumentsTables">
        <link:definition>100260 - Disclosure - Fair Value of Financial Instruments (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosurePropertyAndEquipmentNetTables" id="Role_DisclosurePropertyAndEquipmentNetTables">
        <link:definition>100270 - Disclosure - Property and Equipment, Net (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureCommitmentsAndContingenciesTables" id="Role_DisclosureCommitmentsAndContingenciesTables">
        <link:definition>100280 - Disclosure - Commitments and Contingencies (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureCapitalizationTables" id="Role_DisclosureCapitalizationTables">
        <link:definition>100290 - Disclosure - Capitalization (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureSignificantAgreementsTables" id="Role_DisclosureSignificantAgreementsTables">
        <link:definition>100300 - Disclosure - Significant Agreements (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureStockBasedCompensationTables" id="Role_DisclosureStockBasedCompensationTables">
        <link:definition>100310 - Disclosure - Stock-based Compensation (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureIncomeTaxesTables" id="Role_DisclosureIncomeTaxesTables">
        <link:definition>100320 - Disclosure - Income Taxes (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureNetLossPerShareTables" id="Role_DisclosureNetLossPerShareTables">
        <link:definition>100330 - Disclosure - Net Loss Per Share (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureSupplementalDisclosuresTables" id="Role_DisclosureSupplementalDisclosuresTables">
        <link:definition>100340 - Disclosure - Supplemental Disclosures (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureSelectedQuarterlyFinancialInformationUnauditedTables" id="Role_DisclosureSelectedQuarterlyFinancialInformationUnauditedTables">
        <link:definition>100350 - Disclosure - Selected Quarterly Financial Information (Unaudited) (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureNatureOfBusinessAdditionalInformationDetail" id="Role_DisclosureNatureOfBusinessAdditionalInformationDetail">
        <link:definition>100360 - Disclosure - Nature of Business - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" id="Role_DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail">
        <link:definition>100370 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfRevenueOrAccountsReceivableByMajorCustomersDetail" id="Role_DisclosureSummaryOfSignificantAccountingPoliciesScheduleOfRevenueOrAccountsReceivableByMajorCustomersDetail">
        <link:definition>100380 - Disclosure - Summary of Significant Accounting Policies - Schedule of Revenue or Accounts Receivable by Major Customers (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesSummaryOfEstimatedUsefulLivesOfAssetsDetail" id="Role_DisclosureSummaryOfSignificantAccountingPoliciesSummaryOfEstimatedUsefulLivesOfAssetsDetail">
        <link:definition>100390 - Disclosure - Summary of Significant Accounting Policies - Summary of Estimated Useful Lives of Assets (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureMarketableSecuritiesSummaryOfCompanyMarketableSecuritiesDetail" id="Role_DisclosureMarketableSecuritiesSummaryOfCompanyMarketableSecuritiesDetail">
        <link:definition>100400 - Disclosure - Marketable Securities - Summary of Company Marketable Securities (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureMarketableSecuritiesAdditionalInformationDetail" id="Role_DisclosureMarketableSecuritiesAdditionalInformationDetail">
        <link:definition>100410 - Disclosure - Marketable Securities - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureFairValueOfFinancialInstrumentsScheduleOfFairValueOfCashEquivalentsAndMarketableSecuritiesDetail" id="Role_DisclosureFairValueOfFinancialInstrumentsScheduleOfFairValueOfCashEquivalentsAndMarketableSecuritiesDetail">
        <link:definition>100420 - Disclosure - Fair Value of Financial Instruments - Schedule of Fair Value of Cash Equivalents and Marketable Securities (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureFairValueOfFinancialInstrumentsAdditionalInformationDetail" id="Role_DisclosureFairValueOfFinancialInstrumentsAdditionalInformationDetail">
        <link:definition>100430 - Disclosure - Fair Value of Financial Instruments - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosurePropertyAndEquipmentNetScheduleOfPropertyAndEquipmentDetail" id="Role_DisclosurePropertyAndEquipmentNetScheduleOfPropertyAndEquipmentDetail">
        <link:definition>100440 - Disclosure - Property and Equipment Net - Schedule of Property and Equipment (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosurePropertyAndEquipmentNetAdditionalInformationDetail" id="Role_DisclosurePropertyAndEquipmentNetAdditionalInformationDetail">
        <link:definition>100450 - Disclosure - Property and Equipment Net - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureCommitmentsAndContingenciesAdditionalInformationDetail" id="Role_DisclosureCommitmentsAndContingenciesAdditionalInformationDetail">
        <link:definition>100460 - Disclosure - Commitments and Contingencies - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfFutureMinimumLeasePaymentsUnderNonCancelableOperatingLeasesDetail" id="Role_DisclosureCommitmentsAndContingenciesScheduleOfFutureMinimumLeasePaymentsUnderNonCancelableOperatingLeasesDetail">
        <link:definition>100470 - Disclosure - Commitments and Contingencies - Schedule of Future Minimum Lease Payments Under Non-Cancelable Operating Leases (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureCommitmentsAndContingenciesSummaryOfExpensesIncurredByCompanyDetail" id="Role_DisclosureCommitmentsAndContingenciesSummaryOfExpensesIncurredByCompanyDetail">
        <link:definition>100480 - Disclosure - Commitments and Contingencies - Summary of Expenses Incurred by Company (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureCapitalizationAdditionalInformationDetail" id="Role_DisclosureCapitalizationAdditionalInformationDetail">
        <link:definition>100490 - Disclosure - Capitalization - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureCapitalizationScheduleOfReservedSharesOfCommonStockForFutureIssuanceDetail" id="Role_DisclosureCapitalizationScheduleOfReservedSharesOfCommonStockForFutureIssuanceDetail">
        <link:definition>100500 - Disclosure - Capitalization - Schedule of Reserved Shares of Common Stock for Future Issuance (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureSignificantAgreementsAdditionalInformationDetail" id="Role_DisclosureSignificantAgreementsAdditionalInformationDetail">
        <link:definition>100510 - Disclosure - Significant Agreements - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureSignificantAgreementsScheduleOfLicenseRevenueDetail" id="Role_DisclosureSignificantAgreementsScheduleOfLicenseRevenueDetail">
        <link:definition>100520 - Disclosure - Significant Agreements - Schedule of License Revenue (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureStockBasedCompensationAdditionalInformationDetail" id="Role_DisclosureStockBasedCompensationAdditionalInformationDetail">
        <link:definition>100530 - Disclosure - Stock-based Compensation - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureStockBasedCompensationStockBasedCompensationExpenseByAwardTypeDetail" id="Role_DisclosureStockBasedCompensationStockBasedCompensationExpenseByAwardTypeDetail">
        <link:definition>100540 - Disclosure - Stock-based Compensation - Stock-Based Compensation Expense by Award Type (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureStockBasedCompensationStockBasedCompensationExpenseDetail" id="Role_DisclosureStockBasedCompensationStockBasedCompensationExpenseDetail">
        <link:definition>100550 - Disclosure - Stock-based Compensation - Stock-Based Compensation Expense (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfStockOptionActivityDetail" id="Role_DisclosureStockBasedCompensationSummaryOfStockOptionActivityDetail">
        <link:definition>100560 - Disclosure - Stock-based Compensation - Summary of Stock Option Activity (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureStockBasedCompensationScheduleOfEmployeesStockPurchasePlanValuationAssumptionsDetail" id="Role_DisclosureStockBasedCompensationScheduleOfEmployeesStockPurchasePlanValuationAssumptionsDetail">
        <link:definition>100570 - Disclosure - Stock-based Compensation - Schedule of Employees Stock Purchase Plan Valuation Assumptions (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureStockBasedCompensationSummaryOfUnvestedRsusActivityUnder2015PlanDetail" id="Role_DisclosureStockBasedCompensationSummaryOfUnvestedRsusActivityUnder2015PlanDetail">
        <link:definition>100580 - Disclosure - Stock-based Compensation - Summary of Unvested RSUs Activity Under 2015 Plan (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureRetirementPlanAdditionalInformationDetail" id="Role_DisclosureRetirementPlanAdditionalInformationDetail">
        <link:definition>100590 - Disclosure - Retirement Plan - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail" id="Role_DisclosureIncomeTaxesAdditionalInformationDetail">
        <link:definition>100600 - Disclosure - Income Taxes - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureIncomeTaxesScheduleOfReconciliationOfEffectiveIncomeTaxExpenseBenefitDetail" id="Role_DisclosureIncomeTaxesScheduleOfReconciliationOfEffectiveIncomeTaxExpenseBenefitDetail">
        <link:definition>100610 - Disclosure - Income Taxes - Schedule of Reconciliation of Effective Income Tax Expense (Benefit) (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureIncomeTaxesComponentsOfNetDeferredTaxAssetsDetail" id="Role_DisclosureIncomeTaxesComponentsOfNetDeferredTaxAssetsDetail">
        <link:definition>100620 - Disclosure - Income Taxes - Components of Net Deferred Tax Assets (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureRelatedPartyTransactionsAdditionalInformationDetail" id="Role_DisclosureRelatedPartyTransactionsAdditionalInformationDetail">
        <link:definition>100630 - Disclosure - Related Party Transactions - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureNetLossPerShareSchedulesForComputationOfDilutedWeightedAverageSharesOutstandingDetail" id="Role_DisclosureNetLossPerShareSchedulesForComputationOfDilutedWeightedAverageSharesOutstandingDetail">
        <link:definition>100640 - Disclosure - Net Loss Per Share - Schedules for Computation of Diluted Weighted-Average Shares Outstanding (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureSupplementalDisclosuresSchedulesOfAccruedExpensesAndOtherCurrentLiabilitiesDetail" id="Role_DisclosureSupplementalDisclosuresSchedulesOfAccruedExpensesAndOtherCurrentLiabilitiesDetail">
        <link:definition>100650 - Disclosure - Supplemental Disclosures - Schedules of Accrued Expenses and Other Current Liabilities (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://regenxbio.com/20161231/taxonomy/role/DisclosureSelectedQuarterlyFinancialInformationUnauditedQuarterlyFinancialInformationDetail" id="Role_DisclosureSelectedQuarterlyFinancialInformationUnauditedQuarterlyFinancialInformationDetail">
        <link:definition>100660 - Disclosure - Selected Quarterly Financial Information (Unaudited) - Quarterly Financial Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
    </appinfo>
  </annotation>
  <element id="rgnx_DocumentAndEntityInformationAbstract" name="DocumentAndEntityInformationAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_AccruedExpensesAndOtherCurrentLiabilities" name="AccruedExpensesAndOtherCurrentLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="rgnx_GrantsRevenueExpenses" name="GrantsRevenueExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="rgnx_NetGainOnExtinguishmentOfPreferredStockForEarningsPerShare" name="NetGainOnExtinguishmentOfPreferredStockForEarningsPerShare" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="rgnx_TemporaryEquityConvertedDuringPeriodShares" name="TemporaryEquityConvertedDuringPeriodShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="rgnx_TemporaryEquityChangesAsPartOfReorganization" name="TemporaryEquityChangesAsPartOfReorganization" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="rgnx_PreferredStockAccretionDecrementOfRedemptionDiscount" name="PreferredStockAccretionDecrementOfRedemptionDiscount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="rgnx_DiscountOnRelatedPartyPromissoryNotes" name="DiscountOnRelatedPartyPromissoryNotes" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="rgnx_StockIssuedDuringPeriodValueNewIssuanceCost" name="StockIssuedDuringPeriodValueNewIssuanceCost" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="rgnx_GainLossOnExtinguishmentOfConvertiblePreferredStock" name="GainLossOnExtinguishmentOfConvertiblePreferredStock" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="rgnx_DiscountOnRelatedPartyPromissoryNotesValues" name="DiscountOnRelatedPartyPromissoryNotesValues" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="rgnx_SeriesAConvertiblePreferredStockMember" name="SeriesAConvertiblePreferredStockMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_SeriesBConvertiblePreferredStockMember" name="SeriesBConvertiblePreferredStockMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_SeriesCConvertiblePreferredStockMember" name="SeriesCConvertiblePreferredStockMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_SeriesDConvertiblePreferredStockMember" name="SeriesDConvertiblePreferredStockMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_ConvertiblePreferredStockAndPreferredUnitsMember" name="ConvertiblePreferredStockAndPreferredUnitsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_ClassAUnitsMember" name="ClassAUnitsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_TransactionCostsAssociatedWithStockIssuance" name="TransactionCostsAssociatedWithStockIssuance" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="rgnx_IncreaseDecreaseInDeferredRentPayable" name="IncreaseDecreaseInDeferredRentPayable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="rgnx_DeferredIssuanceCostsForPotentialPublicOfferingOfCommonStockInAccruedExpenses" name="DeferredIssuanceCostsForPotentialPublicOfferingOfCommonStockInAccruedExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="rgnx_ConversionOfRelatedPartyAccruedServiceFeesToConvertiblePreferredStock" name="ConversionOfRelatedPartyAccruedServiceFeesToConvertiblePreferredStock" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="rgnx_DeferredIssuanceCostsForConvertiblePreferredStockInAccruedExpenses" name="DeferredIssuanceCostsForConvertiblePreferredStockInAccruedExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="rgnx_ScheduleOfRevenueOrAccountsReceivableByMajorCustomersTableTextBlock" name="ScheduleOfRevenueOrAccountsReceivableByMajorCustomersTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="rgnx_ScheduleOfUsefulLivesOfAssetsTableTextBlock" name="ScheduleOfUsefulLivesOfAssetsTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="rgnx_TrusteesOfTheUniversityOfPennsylvaniaMember" name="TrusteesOfTheUniversityOfPennsylvaniaMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_GlaxoSmithKlineLLCMember" name="GlaxoSmithKlineLLCMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_ScheduleOfLicenseRevenueTableTextBlock" name="ScheduleOfLicenseRevenueTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="rgnx_TwoThousandFourteenAndTwoThousandFifteenEquityIncentivePlanMember" name="TwoThousandFourteenAndTwoThousandFifteenEquityIncentivePlanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_NonEmployeeStockOptionMember" name="NonEmployeeStockOptionMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_VariableInterestsAndEquityMethodInvestmentsDisclosureAbstract" name="VariableInterestsAndEquityMethodInvestmentsDisclosureAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_SignificantAccountingPoliciesLineItems" name="SignificantAccountingPoliciesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_SignificantAccountingPoliciesTable" name="SignificantAccountingPoliciesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_ConversionToCCorporationMember" name="ConversionToCCorporationMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_CustomerAMember" name="CustomerAMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_CustomerBMember" name="CustomerBMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_CustomerCMember" name="CustomerCMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_CustomerDMember" name="CustomerDMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_CustomerEMember" name="CustomerEMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_CustomerFMember" name="CustomerFMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_CustomerGMember" name="CustomerGMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_CustomerHMember" name="CustomerHMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_ComputerEquipmentAndSoftwareMember" name="ComputerEquipmentAndSoftwareMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_ForfeitureRateUsedToCalculateStockBasedCompensationExpense" name="ForfeitureRateUsedToCalculateStockBasedCompensationExpense" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="rgnx_DimensionTherapeuticsIncMember" name="DimensionTherapeuticsIncMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_AvailableForSaleSecuritiesRemainingMaturitiesGreaterThanThreeYears" name="AvailableForSaleSecuritiesRemainingMaturitiesGreaterThanThreeYears" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="rgnx_OfficeAndLaboratoryFacilitiesMember" name="OfficeAndLaboratoryFacilitiesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_OperatingLeasesRenewalTermMaximum" name="OperatingLeasesRenewalTermMaximum" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="rgnx_LeaseCommencedDate" name="LeaseCommencedDate" type="xbrli:gYearMonthItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="rgnx_LicenseFeesMember" name="LicenseFeesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_SublicenseFeesMember" name="SublicenseFeesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_RoyaltiesOnSalesOfReagentsMember" name="RoyaltiesOnSalesOfReagentsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_MaintenanceOfLicensedPatentsMember" name="MaintenanceOfLicensedPatentsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_RegentsOfTheUniversityOfMinnesotaMember" name="RegentsOfTheUniversityOfMinnesotaMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_AnnualLicenseMaintenanceFeeMember" name="AnnualLicenseMaintenanceFeeMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_RoyaltiesAndSublicenseFeesMember" name="RoyaltiesAndSublicenseFeesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_LicenseAgreementPercentageOfOwnershipInterestIssuedAsConsideration" name="LicenseAgreementPercentageOfOwnershipInterestIssuedAsConsideration" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="rgnx_NumberOfMilestonesAchieved" name="NumberOfMilestonesAchieved" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="rgnx_MilestonePaymentObligation" name="MilestonePaymentObligation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="rgnx_UpfrontLicenseFeePaidAndPatentMaintenanceExpensesReimbursed" name="UpfrontLicenseFeePaidAndPatentMaintenanceExpensesReimbursed" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="rgnx_UpfrontLicenseFeePaid" name="UpfrontLicenseFeePaid" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="rgnx_MilestonePayments" name="MilestonePayments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="rgnx_NetGainLossOnExtinguishmentOfPreferredStockForEarningsPerShare" name="NetGainLossOnExtinguishmentOfPreferredStockForEarningsPerShare" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="rgnx_EquityIncentivePlanMember" name="EquityIncentivePlanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_MilestoneFeePaymentsUponSubmissionPreclinicalFilings" name="MilestoneFeePaymentsUponSubmissionPreclinicalFilings" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="rgnx_MilestoneFeePaymentsUponCommencementOfClinicalTrials" name="MilestoneFeePaymentsUponCommencementOfClinicalTrials" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="rgnx_MilestoneFeePaymentsUponSubmissionOfRegulatoryApprovalFilings" name="MilestoneFeePaymentsUponSubmissionOfRegulatoryApprovalFilings" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="rgnx_MilestoneFeePaymentsUponApprovalOfCommercialProducts" name="MilestoneFeePaymentsUponApprovalOfCommercialProducts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="rgnx_MilestoneFeePaymentsUponAchievementOfSpecifiedSalesTargets" name="MilestoneFeePaymentsUponAchievementOfSpecifiedSalesTargets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="rgnx_LicenseAgreementsAbstract" name="LicenseAgreementsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_SignificantAgreementsLineItems" name="SignificantAgreementsLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_SignificantAgreementsTable" name="SignificantAgreementsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_MeuSIXMember" name="MeuSIXMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_UpfrontLicenseFeeAndOptionFeesRevenue" name="UpfrontLicenseFeeAndOptionFeesRevenue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="rgnx_LicenseAndMilestoneFeesRevenue" name="LicenseAndMilestoneFeesRevenue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="rgnx_LicensesRevenueIncludingAmountsFromRelatedParties" name="LicensesRevenueIncludingAmountsFromRelatedParties" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="rgnx_LicenseAgreementRevenueRecognitionAbstract" name="LicenseAgreementRevenueRecognitionAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_PeriodOfGrant" name="PeriodOfGrant" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="rgnx_PercentageOfReimbursedByGrantor" name="PercentageOfReimbursedByGrantor" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="rgnx_MaximumAmountOfReimbursedCostRecognizedForGrant" name="MaximumAmountOfReimbursedCostRecognizedForGrant" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="rgnx_ShareBasedCompensationArrangementIncreaseInNumberOfSharesReservedForIssuancePercentageUnderPlan" name="ShareBasedCompensationArrangementIncreaseInNumberOfSharesReservedForIssuancePercentageUnderPlan" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="rgnx_TwoThousandAndFifteenEquityIncentivePlanMember" name="TwoThousandAndFifteenEquityIncentivePlanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_EmployeeAndDirectorStockOptionMember" name="EmployeeAndDirectorStockOptionMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_TwoThousandFifteenEmployeeStockPurchasePlanMember" name="TwoThousandFifteenEmployeeStockPurchasePlanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_StockPlanExpirationDate" name="StockPlanExpirationDate" type="xbrli:gYearMonthItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="rgnx_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfOutstandingStockMinimum" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfOutstandingStockMinimum" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="rgnx_IncomeTaxDisclosureLineItems" name="IncomeTaxDisclosureLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_IncomeTaxDisclosureTable" name="IncomeTaxDisclosureTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_IncomeTaxReconciliationFederalDeferredTaxAssetUponConversion" name="IncomeTaxReconciliationFederalDeferredTaxAssetUponConversion" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="rgnx_IncomeTaxReconciliationIncreaseInAssetValueUponConversion" name="IncomeTaxReconciliationIncreaseInAssetValueUponConversion" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="rgnx_DeferredTaxAssetsIncreaseInAssetValueUponConversion" name="DeferredTaxAssetsIncreaseInAssetValueUponConversion" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="rgnx_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsNonQualifiedShareBasedCompensationCost" name="DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsNonQualifiedShareBasedCompensationCost" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="rgnx_OperatingLossCarryforwardsExpirationYear" name="OperatingLossCarryforwardsExpirationYear" type="xbrli:gYearItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="rgnx_TaxCreditCarryforwardExpirationYear" name="TaxCreditCarryforwardExpirationYear" type="xbrli:gYearItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="rgnx_CumulativeChangesInOwnershipInterestPercentage" name="CumulativeChangesInOwnershipInterestPercentage" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <element id="rgnx_OwnershipInterestChangePeriod" name="OwnershipInterestChangePeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="rgnx_ManufacturingOfReagentsForSaleMember" name="ManufacturingOfReagentsForSaleMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_ResearchAndDevelopmentServicesMember" name="ResearchAndDevelopmentServicesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_CommercialLicenseAgreementMember" name="CommercialLicenseAgreementMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_PennMember" name="PennMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_FoxKiserLimitedLiabilityPartnershipMember" name="FoxKiserLimitedLiabilityPartnershipMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_PromissoryNotesMember" name="PromissoryNotesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_SecondPromissoryNotesMember" name="SecondPromissoryNotesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_PrimaryPromissoryNotesMember" name="PrimaryPromissoryNotesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_ChiefScientificAdvisoryMember" name="ChiefScientificAdvisoryMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_LicenseAgreementInitiationDate" name="LicenseAgreementInitiationDate" type="xbrli:dateItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="rgnx_ResearchAndDevelopmentExpenseGross" name="ResearchAndDevelopmentExpenseGross" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="rgnx_NetReimbursableCosts" name="NetReimbursableCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="rgnx_OptionFeePayableUponExercise" name="OptionFeePayableUponExercise" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="rgnx_AccruedInterestMonthlyCompoundingInterestRate" name="AccruedInterestMonthlyCompoundingInterestRate" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="rgnx_RelatedPartyTransactionExpensesFromTransactionsWithRelatedPartyAdvisoryFees" name="RelatedPartyTransactionExpensesFromTransactionsWithRelatedPartyAdvisoryFees" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="rgnx_DebtWithShareSettlementOptionMember" name="DebtWithShareSettlementOptionMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_EmployeeStockPurchasePlanMember" name="EmployeeStockPurchasePlanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="rgnx_AccruedExternalResearchAndDevelopmentExpenses" name="AccruedExternalResearchAndDevelopmentExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="rgnx_AccruedPurchasesOfPropertyAndEquipment" name="AccruedPurchasesOfPropertyAndEquipment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="rgnx_AccruedExternalGeneralAndAdministrativeExpenses" name="AccruedExternalGeneralAndAdministrativeExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="rgnx_AccruedSublicenseFeesAndRoyaltiesOnReagentSales" name="AccruedSublicenseFeesAndRoyaltiesOnReagentSales" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
</schema>
