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  <xs:element id="rnac_DebtCovenantNetProductRevenueCovenant" abstract="false" name="DebtCovenantNetProductRevenueCovenant" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="rnac_LineOfCreditFacilityFinalPaymentFeePercentage" abstract="false" name="LineOfCreditFacilityFinalPaymentFeePercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="rnac_LineOfCreditFacilityFinalPaymentFeeAmount" abstract="false" name="LineOfCreditFacilityFinalPaymentFeeAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="rnac_DebtInstrumentAccretedFinalPaymentFee" abstract="false" name="DebtInstrumentAccretedFinalPaymentFee" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="rnac_UnamortizedTermLoansDerivativeDiscount" abstract="false" name="UnamortizedTermLoansDerivativeDiscount" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="rnac_AmortizationOfCompoundDerivativeDiscount" abstract="false" name="AmortizationOfCompoundDerivativeDiscount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="rnac_AmortizationOfOriginalIssueDiscount" abstract="false" name="AmortizationOfOriginalIssueDiscount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="rnac_AccretionOfFinalPaymentFee" abstract="false" name="AccretionOfFinalPaymentFee" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="rnac_AmortizationOfDeferredDebtIssuanceCosts" abstract="false" name="AmortizationOfDeferredDebtIssuanceCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="rnac_AmortizationOfDeferredOriginalIssueDiscount" abstract="false" name="AmortizationOfDeferredOriginalIssueDiscount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="rnac_AtTheMarketOfferingMember" abstract="true" name="AtTheMarketOfferingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rnac_SaleOfStockAggregateMaximumGrossSalesProceeds" abstract="false" name="SaleOfStockAggregateMaximumGrossSalesProceeds" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="rnac_SaleOfStockAggregateMaximumGrossSalesProceedsAvailable" abstract="false" name="SaleOfStockAggregateMaximumGrossSalesProceedsAvailable" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="rnac_ClassOfWarrantOrRightOutstandingWarrantsIssued" abstract="false" name="ClassOfWarrantOrRightOutstandingWarrantsIssued" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="rnac_ClassOfWarrantOrRightOutstandingWarrantsExercised" abstract="false" name="ClassOfWarrantOrRightOutstandingWarrantsExercised" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="rnac_ClassOfWarrantOrRightOutstandingWarrantsCancelled" abstract="false" name="ClassOfWarrantOrRightOutstandingWarrantsCancelled" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="rnac_ClassOfWarrantOrRightRollForward" abstract="true" name="ClassOfWarrantOrRightRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="rnac_ClassOfWarrantOrRightWeightedAverageExercisePriceRollForward" abstract="true" name="ClassOfWarrantOrRightWeightedAverageExercisePriceRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="rnac_CommonStockOptionsReservedForIssuanceMember" abstract="true" name="CommonStockOptionsReservedForIssuanceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rnac_RestrictedStockUnitsUnvestedMember" abstract="true" name="RestrictedStockUnitsUnvestedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rnac_SharesReservedForIssuanceUnderTheAtTheMarketOfferingMember" abstract="true" name="SharesReservedForIssuanceUnderTheAtTheMarketOfferingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rnac_StockIncentivePlan2016Member" abstract="false" name="StockIncentivePlan2016Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rnac_EmploymentInducementIncentiveAwardPlanMember" abstract="true" name="EmploymentInducementIncentiveAwardPlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rnac_OldCartesianPlanMember" abstract="true" name="OldCartesianPlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rnac_OldCartestianMember" abstract="true" name="OldCartestianMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rnac_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantIncreaseDecrease" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrantIncreaseDecrease" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="rnac_ShareBasedCompensationArrangementByShareBasedPaymentAwardForfeituresRate" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardForfeituresRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="rnac_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageFairValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsWeightedAverageFairValue" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="rnac_A2016Plan2018InducementIncentiveAwardPlanAndOldCartesianPlanMember" abstract="true" name="A2016Plan2018InducementIncentiveAwardPlanAndOldCartesianPlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rnac_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsReservedForIssuanceGross" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsReservedForIssuanceGross" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="rnac_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsReservedForIssuanceInPeriodWeightedAverageExercisePrice" abstract="false" name="ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsReservedForIssuanceInPeriodWeightedAverageExercisePrice" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="rnac_SharebasedCompensationArrangementbySharebasedPaymentAwardOptionsVestedWeightedAverageExercisePrice" abstract="false" name="SharebasedCompensationArrangementbySharebasedPaymentAwardOptionsVestedWeightedAverageExercisePrice" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="rnac_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTermAbstract" abstract="true" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTermAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="rnac_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedOutstandingWeightedAverageRemainingContractualTerm" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedOutstandingWeightedAverageRemainingContractualTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="rnac_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValueAbstract" abstract="true" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValueAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="rnac_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedOutstandingIntrinsicValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedOutstandingIntrinsicValue" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="rnac_SwedishOrphanBiovitrumABSOBIMember" abstract="true" name="SwedishOrphanBiovitrumABSOBIMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rnac_NationalInstituteOfNeurologicalDisordersAndStrokeOfTheNationalInstitutesOfHealthFundingMember" abstract="true" name="NationalInstituteOfNeurologicalDisordersAndStrokeOfTheNationalInstitutesOfHealthFundingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rnac_RevenueRemainingPerformanceObligationVariableConsiderationAmount" abstract="false" name="RevenueRemainingPerformanceObligationVariableConsiderationAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="rnac_GovernmentAssistancePotentialAdditionalAwardAmount" abstract="false" name="GovernmentAssistancePotentialAdditionalAwardAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="rnac_GovernmentAssistanceCurrentStatementOfFinancialPositionExtensibleEnumerationNotDisclosedFlag" abstract="false" name="GovernmentAssistanceCurrentStatementOfFinancialPositionExtensibleEnumerationNotDisclosedFlag" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="rnac_WestGeneBiopharmaCo.Ltd.Member" abstract="true" name="WestGeneBiopharmaCo.Ltd.Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rnac_UpfrontLicensePaymentInResearchAndDevelopmentExpense" abstract="false" name="UpfrontLicensePaymentInResearchAndDevelopmentExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="rnac_BiogenM.A.Inc.Member" abstract="true" name="BiogenM.A.Inc.Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rnac_CollaborativeArrangementWrittenNoticePeriodForTermination" abstract="false" name="CollaborativeArrangementWrittenNoticePeriodForTermination" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="rnac_NationalCancerInstituteAgreementMember" abstract="true" name="NationalCancerInstituteAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rnac_LicenseAndOptionAgreementRoyaltyPayment" abstract="false" name="LicenseAndOptionAgreementRoyaltyPayment" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="rnac_LicenseAndOptionAgreementBenchmarkRoyaltiesMaximum" abstract="false" name="LicenseAndOptionAgreementBenchmarkRoyaltiesMaximum" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="rnac_LicenseAgreementWithShenyangSunshinePharmaceuticalCompanyLimitedMember" abstract="false" name="LicenseAgreementWithShenyangSunshinePharmaceuticalCompanyLimitedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rnac_AggregateAmountOfUpfrontAndMilestoneBasedPaymentsPaid" abstract="false" name="AggregateAmountOfUpfrontAndMilestoneBasedPaymentsPaid" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="rnac_AggregateAmountForFuturePaymentsUponAchievementOfClinicalAndRegulatoryApprovalMilestonesForProductsContainingImmTORPlatform" abstract="false" name="AggregateAmountForFuturePaymentsUponAchievementOfClinicalAndRegulatoryApprovalMilestonesForProductsContainingImmTORPlatform" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="rnac_NumberOfReportableSegmentsNotDisclosedFlag" abstract="false" name="NumberOfReportableSegmentsNotDisclosedFlag" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="rnac_OperatingSegmentMember" abstract="true" name="OperatingSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rnac_Descartes08ForDermatomyositisMember" abstract="true" name="Descartes08ForDermatomyositisMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rnac_EarlyStageProgramsMember" abstract="true" name="EarlyStageProgramsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rnac_ResearchAndDevelopmentEmployeeExpensesMember" abstract="true" name="ResearchAndDevelopmentEmployeeExpensesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rnac_ResearchAndDevelopmentShareBasedPaymentArrangementExpenseMember" abstract="true" name="ResearchAndDevelopmentShareBasedPaymentArrangementExpenseMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rnac_ResearchAndDevelopmentFacilitiesAndOtherExpensesMember" abstract="true" name="ResearchAndDevelopmentFacilitiesAndOtherExpensesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="rnac_NonoperatingIncomeExpenseAdjusted" abstract="false" name="NonoperatingIncomeExpenseAdjusted" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
