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  <xsd:element id="meip_ReceivablesAmountsBilled" name="ReceivablesAmountsBilled" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="meip_ReceivablesPaymentsReceived" name="ReceivablesPaymentsReceived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="meip_RevenuePerformanceObligationAmount" name="RevenuePerformanceObligationAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="meip_SaleOfSharesAndWarrantsUnderAgreement" name="SaleOfSharesAndWarrantsUnderAgreement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="meip_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantDateFairValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantDateFairValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="meip_Sharebasedcompensationarrangementbysharebasedpaymentawardoptionsclosingstockprice" name="Sharebasedcompensationarrangementbysharebasedpaymentawardoptionsclosingstockprice" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="meip_ShelfRegistrationStatementValue" name="ShelfRegistrationStatementValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="meip_StockIssuanceCosts" name="StockIssuanceCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="meip_Stockissuedduringperiodvaluestockwarrantsexercised" name="Stockissuedduringperiodvaluestockwarrantsexercised" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="meip_TaxableIncomePercentage" name="TaxableIncomePercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="meip_TotalTransactionPriceInRespectOfColloborationRevenue" name="TotalTransactionPriceInRespectOfColloborationRevenue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="meip_TotalUpfrontPaymentReceivableForGrantOfRights" name="TotalUpfrontPaymentReceivableForGrantOfRights" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="meip_UnsoldSecuritiesSharesAndWarrantsUnderAgreement" name="UnsoldSecuritiesSharesAndWarrantsUnderAgreement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="meip_UpfrontAndMilestonePayments" name="UpfrontAndMilestonePayments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="meip_UpFrontPayment" name="UpFrontPayment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="meip_WarrantsIssuedPursuantToCashlessExercise" name="WarrantsIssuedPursuantToCashlessExercise" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="meip_AgreementDomain" name="AgreementDomain" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_TaxReformDomain" name="TaxReformDomain" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_AccruedLiabilitiesLineItems" name="AccruedLiabilitiesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_ContractWithCustomerAssetAndLiabilityLineItems" name="ContractWithCustomerAssetAndLiabilityLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_FairValueMeasurementsSignificantUnobservableInputsLineItems" name="FairValueMeasurementsSignificantUnobservableInputsLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_IncomeTaxesLineItemsLineItems" name="IncomeTaxesLineItemsLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_PotentiallyDilutiveSecuritiesOutstandingLineItems" name="PotentiallyDilutiveSecuritiesOutstandingLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_PreTaxIncomeLossLineItems" name="PreTaxIncomeLossLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_QuarterlyFinancialInformationLineItems" name="QuarterlyFinancialInformationLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_RecognizedRevenueAssociatedWithTheFollowingLicenseAgreementsLineItems" name="RecognizedRevenueAssociatedWithTheFollowingLicenseAgreementsLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_ReconciliationOfStatutoryFederalTaxRateLineItems" name="ReconciliationOfStatutoryFederalTaxRateLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_AdjustmentsMember" name="AdjustmentsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_AfterTaxReformMember" name="AfterTaxReformMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_AsOriginallyReportedMember" name="AsOriginallyReportedMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_AsRestatedMember" name="AsRestatedMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_AtTheMarketSaleAgreementMember" name="AtTheMarketSaleAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_BeforeTaxReformMember" name="BeforeTaxReformMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_CaresActMember" name="CaresActMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_CydexLicenseAgreementMember" name="CydexLicenseAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_DevelopmentServicesMember" name="DevelopmentServicesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_DevelopmentServicesPerformanceObligationsMember" name="DevelopmentServicesPerformanceObligationsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_EmployeesMember" name="EmployeesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_ExUsLicenseMember" name="ExUsLicenseMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_FurnitureAndEquipmentMember" name="FurnitureAndEquipmentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_HelsinnLicenseAgreementMember" name="HelsinnLicenseAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_IncrementalPaymentMember" name="IncrementalPaymentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_InducementPlanMember" name="InducementPlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_KkcAgreementsAndHelsinnLicenseAgreementMember" name="KkcAgreementsAndHelsinnLicenseAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_KkcAgreementsMember" name="KkcAgreementsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_KkcCommercializationAgreementAndTheHelsinnLicenseAgreementMember" name="KkcCommercializationAgreementAndTheHelsinnLicenseAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_KyowaKirinCoMember" name="KyowaKirinCoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_PassThroughServicesMember" name="PassThroughServicesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_PhaseThreeClinicalTrialMember" name="PhaseThreeClinicalTrialMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_PotentialPaymentsOnAchievementOfDevelopmentRegulatoryAndCommercialMilestonesMember" name="PotentialPaymentsOnAchievementOfDevelopmentRegulatoryAndCommercialMilestonesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_PresageBiosciencesIncMember" name="PresageBiosciencesIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_PresageLicenseAgreementMember" name="PresageLicenseAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_SanDiegoCaliforniaMember" name="SanDiegoCaliforniaMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_SbioMember" name="SbioMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_SbioPurchaseAgreementMember" name="SbioPurchaseAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_TwoThousandAndEightOmnibusPlanMember" name="TwoThousandAndEightOmnibusPlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_TwoThousandAndTwentyAtTheMarketSaleAgreementMember" name="TwoThousandAndTwentyAtTheMarketSaleAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_UnderwrittenRegisteredOfferingMember" name="UnderwrittenRegisteredOfferingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_UsLicenseMember" name="UsLicenseMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_ClinicalDevelopmentProgramsPolicyTextBlock" name="ClinicalDevelopmentProgramsPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="meip_InterestIncomePolicyTextBlock" name="InterestIncomePolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="meip_LiquidityPolicyTextBlock" name="LiquidityPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="meip_ContractWithCustomerAssetAndLiabilityTable" name="ContractWithCustomerAssetAndLiabilityTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_FairValueMeasurementsSignificantUnobservableInputsTable" name="FairValueMeasurementsSignificantUnobservableInputsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_RecognizedRevenueAssociatedWithTheFollowingLicenseAgreementsTable" name="RecognizedRevenueAssociatedWithTheFollowingLicenseAgreementsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="meip_FairValueOfWarrantLiabilityAssumptionsTableTextBlock" name="FairValueOfWarrantLiabilityAssumptionsTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="meip_ScheduleOfChangesInFairValueOfWarrantLiabilityTableTextBlock" name="ScheduleOfChangesInFairValueOfWarrantLiabilityTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="meip_ScheduleOfRevenueAssociatedWithLicenseAgreementTableTextBlock" name="ScheduleOfRevenueAssociatedWithLicenseAgreementTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="meip_DisclosureOfSupplementalCashFlowInformationRelatedToOperatingLeasesTableTextBlock" name="DisclosureOfSupplementalCashFlowInformationRelatedToOperatingLeasesTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="meip_OtherLicensingArrangementsTextBlock" name="OtherLicensingArrangementsTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="meip_ScheduleOfImpactOfTheRestatementAdjustmentsOfCashFlowsTableTextBlock" name="ScheduleOfImpactOfTheRestatementAdjustmentsOfCashFlowsTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="meip_ScheduleOfImpactOfTheRestatementAdjustmentsOfLiabilitiesAndStockholdersEquityTableTextBlock" name="ScheduleOfImpactOfTheRestatementAdjustmentsOfLiabilitiesAndStockholdersEquityTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="meip_ScheduleOfImpactOfTheRestatementAdjustmentsOfOperationsTableTextBlock" name="ScheduleOfImpactOfTheRestatementAdjustmentsOfOperationsTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="meip_ScheduleOfImpactOfTheRestatementAdjustmentsOfStockholdersEquityTableTextBlock" name="ScheduleOfImpactOfTheRestatementAdjustmentsOfStockholdersEquityTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
</xsd:schema>
