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<!-- DFIN ActiveDisclosure(SM) XBRL Schema Document - http://www.dfinsolutions.com/ -->
<!-- Creation Date      : 2021-11-29T21:28:40.4466746+00:00 -->
<!-- Version            : 5.0.1.702 -->
<!-- Package ID         : c651bacf00994187905e6ee1e1bdb2bf -->
<!-- Copyright (c) 2021 Donnelley Financial Solutions, Inc. All Rights Reserved. -->
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  <xsd:element id="inkt_InterestAccruedOnConvertibleAffiliatedNote" name="InterestAccruedOnConvertibleAffiliatedNote" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="inkt_IncreaseDecreaseInRepayableAdvanceReceived" name="IncreaseDecreaseInRepayableAdvanceReceived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="inkt_ProceedsFromIssuanceOfConvertibleAffiliatedNote" name="ProceedsFromIssuanceOfConvertibleAffiliatedNote" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="inkt_OtherLongTermLiabilitiesTextBlock" name="OtherLongTermLiabilitiesTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="inkt_NonVestedSharesMember" name="NonVestedSharesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="inkt_OtherCurrentAssets" name="OtherCurrentAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="inkt_AccruedResearchServicesCurrent" name="AccruedResearchServicesCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="inkt_ValueAddedTaxAccruedLiabilitiesCurrent" name="ValueAddedTaxAccruedLiabilitiesCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <xsd:element id="inkt_TwoThousandAndEighteenEIPMember" name="TwoThousandAndEighteenEIPMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="inkt_TwoThousandTwentyOneEmployeeStockPurchasePlanMember" name="TwoThousandTwentyOneEmployeeStockPurchasePlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="inkt_PercentageOfServiceCost" name="PercentageOfServiceCost" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="inkt_ServiceAgreementNoticePeriod" name="ServiceAgreementNoticePeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="inkt_NewIntercompanyServiceAgreementMember" name="NewIntercompanyServiceAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="inkt_AgenusIncMember" name="AgenusIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="inkt_PercentageOfComputationOfInterest" name="PercentageOfComputationOfInterest" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="inkt_PercentageValueOfCommonStockSoldInInitialPublicOffering" name="PercentageValueOfCommonStockSoldInInitialPublicOffering" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <xsd:element id="inkt_PeriodOfLicenseAgreement" name="PeriodOfLicenseAgreement" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="inkt_PeriodForBreachOfPaymentObligations" name="PeriodForBreachOfPaymentObligations" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="inkt_TerminateLicenseAgreementPeriod" name="TerminateLicenseAgreementPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="inkt_PaycheckProtectionProgramLoanMember" name="PaycheckProtectionProgramLoanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="inkt_AuthorizedCapitalStockIncreased" name="AuthorizedCapitalStockIncreased" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
</xsd:schema>
