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  <xs:element id="cbus_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableRollForward" abstract="true" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cbus_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableVestedInPeriod" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableVestedInPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="cbus_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableExpirationsInPeriod" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableExpirationsInPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="cbus_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableVestedInPeriodWeightedAverageExercisePrice" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableVestedInPeriodWeightedAverageExercisePrice" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="cbus_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableExpirationsInPeriodWeightedAverageExercisePrice" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableExpirationsInPeriodWeightedAverageExercisePrice" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="cbus_FinanceLeaseCost" abstract="false" name="FinanceLeaseCost" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cbus_LesseeOperatingLeaseLiabilityToBePaidAfterYearFour" abstract="false" name="LesseeOperatingLeaseLiabilityToBePaidAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cbus_AccruedRoyaltiesMeasurementInput" abstract="false" name="AccruedRoyaltiesMeasurementInput" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:decimalItemType"/>
  <xs:element id="cbus_RelatedPartyTransactionRoyaltyPaymentsUnpaid" abstract="false" name="RelatedPartyTransactionRoyaltyPaymentsUnpaid" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cbus_AccruedRoyaltiesRollForward" abstract="true" name="AccruedRoyaltiesRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="cbus_NoncashOrPartNoncashAcquisitionFixedAssetsAcquired" abstract="false" name="NoncashOrPartNoncashAcquisitionFixedAssetsAcquired" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cbus_UnpaidStockOfferingCostsIncludedInAccountsPayable" abstract="false" name="UnpaidStockOfferingCostsIncludedInAccountsPayable" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cbus_UnpaidStockOfferingCostsIncludedInAccruedExpenses" abstract="false" name="UnpaidStockOfferingCostsIncludedInAccruedExpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cbus_ReclassificationOfWarrantLiabilityToEquity" abstract="false" name="ReclassificationOfWarrantLiabilityToEquity" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="cbus_ProctorGambleMember" abstract="true" name="ProctorGambleMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
