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  <element id="edit_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfTotalSharesOutstandingReservedForFutureIssuance" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfTotalSharesOutstandingReservedForFutureIssuance" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_DefinedContributionPlanMaximumAnnualContributionsPerEmployeeMatchingContributionAmount" name="DefinedContributionPlanMaximumAnnualContributionsPerEmployeeMatchingContributionAmount" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_StrategicAllianceMember" name="StrategicAllianceMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_MarketCapitalization" name="MarketCapitalization" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_AllerganMember" name="AllerganMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_NumberOfCollaborationDevelopmentPrograms" name="NumberOfCollaborationDevelopmentPrograms" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_HurleyStreetLeaseMember" name="HurleyStreetLeaseMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_LicenseAgreements2016Member" name="LicenseAgreements2016Member" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_CollaborativeArrangementsAbstract" name="CollaborativeArrangementsAbstract" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_NumberOfAdditionalDevelopmentAndCommercializationLicenseToBePurchased" name="NumberOfAdditionalDevelopmentAndCommercializationLicenseToBePurchased" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_OneTimePaymentToAcquireLicense" name="OneTimePaymentToAcquireLicense" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_AllocableArrangementConsiderationResearchAndDevelopmentServicesUnitOfAccounting" name="AllocableArrangementConsiderationResearchAndDevelopmentServicesUnitOfAccounting" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_PotentialLiabilityForSalesMilestones" name="PotentialLiabilityForSalesMilestones" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_BroadInstituteIncMember" name="BroadInstituteIncMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_CowenAndCompanyLlcMember" name="CowenAndCompanyLlcMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_ScheduleOfCommonStockReservedForFutureIssuanceTableTextBlock" name="ScheduleOfCommonStockReservedForFutureIssuanceTableTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_RevenueFromContractWithCustomerTransactionPrice" name="RevenueFromContractWithCustomerTransactionPrice" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_ScheduleOfChangeInContractWithCustomerAssetAndLiabilityTableTextBlock" name="ScheduleOfChangeInContractWithCustomerAssetAndLiabilityTableTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_ContractWithCustomerLiabilityAdditions" name="ContractWithCustomerLiabilityAdditions" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_ContractWithCustomerLiabilityDeductions" name="ContractWithCustomerLiabilityDeductions" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_StockIssuedForAssetAcquisition" name="StockIssuedForAssetAcquisition" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_StockIssuedForSettlementOfNotesPayable" name="StockIssuedForSettlementOfNotesPayable" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_SponsoredResearchAgreementMember" name="SponsoredResearchAgreementMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_FundingPaymentsDueAndPayableOne" name="FundingPaymentsDueAndPayableOne" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_FundingPaymentsDueAndPayableTwo" name="FundingPaymentsDueAndPayableTwo" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_EquitySecuritiesPolicyTextBlock" name="EquitySecuritiesPolicyTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_AdditionalProceedsFromCollaborators" name="AdditionalProceedsFromCollaborators" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_NumberOfMilestonesRelatedToTechnicalProgress" name="NumberOfMilestonesRelatedToTechnicalProgress" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_MilestonePaymentReceivableRelatedToTechnicalProgressInResearchArea" name="MilestonePaymentReceivableRelatedToTechnicalProgressInResearchArea" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_AmendedAndRestatedCollaborationAndLicenseAgreementMember" name="AmendedAndRestatedCollaborationAndLicenseAgreementMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_RevenueFromContractWithCustomerUpfrontFeeReceived" name="RevenueFromContractWithCustomerUpfrontFeeReceived" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_LicenseAgreementMember" name="LicenseAgreementMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_BeamTherapeuticsIncMember" name="BeamTherapeuticsIncMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_NonCashConsiderationReceivedAggregateFairValue" name="NonCashConsiderationReceivedAggregateFairValue" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_AccountsReceivableAdditions" name="AccountsReceivableAdditions" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_AccountsReceivableDeductions" name="AccountsReceivableDeductions" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_ScheduleOfAccountsReceivableAndContractLiabilitiesTableTextBlock" name="ScheduleOfAccountsReceivableAndContractLiabilitiesTableTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_NoncashInvestmentInEquitySecurities" name="NoncashInvestmentInEquitySecurities" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_OptionExercisePaymentReceived" name="OptionExercisePaymentReceived" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_ResearchAndDevelopmentExpensesMember" name="ResearchAndDevelopmentExpensesMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_MarketableSecuritiesUnrealizedGain" name="MarketableSecuritiesUnrealizedGain" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_MarketableSecuritiesAmortizedCost" name="MarketableSecuritiesAmortizedCost" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_IncreaseDecreaseInRightOfUseAssets" name="IncreaseDecreaseInRightOfUseAssets" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_IncreaseDecreaseInRightOfUseLiability" name="IncreaseDecreaseInRightOfUseLiability" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_PublicAndAtMarketOfferingMember" name="PublicAndAtMarketOfferingMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_AtMarketOfferingMember" name="AtMarketOfferingMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_AssetsAndLiabilitiesLesseeOperatingLeaseTableTextBlock" name="AssetsAndLiabilitiesLesseeOperatingLeaseTableTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_StockIssuedDuringPeriodValueRepaymentOfNotes" name="StockIssuedDuringPeriodValueRepaymentOfNotes" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_StockIssuedDuringPeriodSharesRepaymentOfDebt" name="StockIssuedDuringPeriodSharesRepaymentOfDebt" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_ChiefMedicalOfficerMember" name="ChiefMedicalOfficerMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_StockIssuedDuringPeriodValueEmployeeRestrictedCommonStockAwardCommonStockSubjectToRepurchase" name="StockIssuedDuringPeriodValueEmployeeRestrictedCommonStockAwardCommonStockSubjectToRepurchase" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_StockIssuedDuringPeriodSharesEmployeeRestrictedCommonStockAwardSubjectToRepurchase" name="StockIssuedDuringPeriodSharesEmployeeRestrictedCommonStockAwardSubjectToRepurchase" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_AtMarketOfferingOneMember" name="AtMarketOfferingOneMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_AtMarketOfferingTwoMember" name="AtMarketOfferingTwoMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_SuccessPaymentsResearchFundingPaymentsAndNotesPayablesPolicyTextBlock" name="SuccessPaymentsResearchFundingPaymentsAndNotesPayablesPolicyTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_DebtInstrumentPeriodAfterWhichOutstandingPrincipalAndInterestBecomesPayable" name="DebtInstrumentPeriodAfterWhichOutstandingPrincipalAndInterestBecomesPayable" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_PromissoryNotesMember" name="PromissoryNotesMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_LicenseAgreementNumberOfCommonStockIssuedForSettlement" name="LicenseAgreementNumberOfCommonStockIssuedForSettlement" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_AllocableArrangementConsiderationMaterialRights" name="AllocableArrangementConsiderationMaterialRights" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_PotentialRegulatoryLicensedProductsMilestonePayments" name="PotentialRegulatoryLicensedProductsMilestonePayments" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_LicenseAgreementAmendmentFee" name="LicenseAgreementAmendmentFee" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_LicenseAgreementExerciseFee" name="LicenseAgreementExerciseFee" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_AmendedCollaborationAgreement2019Member" name="AmendedCollaborationAgreement2019Member" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_DeferredTaxAssetsLeaseLiability" name="DeferredTaxAssetsLeaseLiability" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_DeferredTaxLiabilitiesRightOfUseAssets" name="DeferredTaxLiabilitiesRightOfUseAssets" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_SublicensingExpenses" name="SublicensingExpenses" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_NonCashTransactionsOfferingCostIncludedInAccountsPayableAndAccruedExpenses" name="NonCashTransactionsOfferingCostIncludedInAccountsPayableAndAccruedExpenses" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_SalesAgreementAmountOfAggregateSaleProceedsOfCommonStockAgreedToBeIssued" name="SalesAgreementAmountOfAggregateSaleProceedsOfCommonStockAgreedToBeIssued" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_MarketableSecuritiesNoncurrentNumberOfSecurities" name="MarketableSecuritiesNoncurrentNumberOfSecurities" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_CollaborationAgreementLiabilityForTerminationOfContract" name="CollaborationAgreementLiabilityForTerminationOfContract" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_NumberOfCollaborationTargets" name="NumberOfCollaborationTargets" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_CollaborationAgreementClinicalAndRegulatoryMilestonesPaymentsForEachTargetProgram" name="CollaborationAgreementClinicalAndRegulatoryMilestonesPaymentsForEachTargetProgram" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_AggregatedSalesMilestonesPayments" name="AggregatedSalesMilestonesPayments" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_TerminationAgreementMember" name="TerminationAgreementMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_PaymentsForExcessOfFairValueOfAcquiredAssets" name="PaymentsForExcessOfFairValueOfAcquiredAssets" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_EmployeeConsultantsAndDirectorsStockOptionsMember" name="EmployeeConsultantsAndDirectorsStockOptionsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_EmployeeMember" name="EmployeeMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_SuccessPaymentAccrued" name="SuccessPaymentAccrued" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_RevenueFromContractWithCustomerResearchAndDevelopmentExpensesFunding" name="RevenueFromContractWithCustomerResearchAndDevelopmentExpensesFunding" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_RevenueFromContractWithCustomerTransactionPriceMilestonePaymentReceived" name="RevenueFromContractWithCustomerTransactionPriceMilestonePaymentReceived" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_RevenueFromContractWithCustomerDevelopmentAndCommercializationLicenseReceived" name="RevenueFromContractWithCustomerDevelopmentAndCommercializationLicenseReceived" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_ProceedsFromSaleOfEquitySecurities" name="ProceedsFromSaleOfEquitySecurities" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_AccruedExternalResearchAndDevelopmentExpensesCurrent" name="AccruedExternalResearchAndDevelopmentExpensesCurrent" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_OneMainStreetMember" name="OneMainStreetMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="edit_CashCashEquivalentsRestrictedCashRestrictedCashEquivalentsAndDebtSecuritiesAvailableForSale" name="CashCashEquivalentsRestrictedCashRestrictedCashEquivalentsAndDebtSecuritiesAvailableForSale" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
</xsd:schema>
