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<!-- DFIN ActiveDisclosure(SM) XBRL Schema Document - http://www.dfinsolutions.com/ -->
<!-- Creation Date      : 2021-09-03T19:59:25.5333791+00:00 -->
<!-- Version            : 5.0.1.648 -->
<!-- Package ID         : 3511a473617b4226afef7206dd5819ad -->
<!-- Copyright (c) 2021 Donnelley Financial Solutions, Inc. All Rights Reserved. -->
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  <xsd:element id="tnya_ShareBasedCompensationArrangementByShareBasedPaymentAwardRepurchasedUnvestedSharesTerminated" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardRepurchasedUnvestedSharesTerminated" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <xsd:element id="tnya_ShareBasedCompensationArrangementByShareBasedPaymentAwardPrincipalAndAccruedInterestAmount" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardPrincipalAndAccruedInterestAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <xsd:element id="tnya_SeriesBConvertiblePreferredStockIssuableInFutureClosingMember" name="SeriesBConvertiblePreferredStockIssuableInFutureClosingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="tnya_OutstandingStockOptionsMember" name="OutstandingStockOptionsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <xsd:element id="tnya_TwoThousandTwentyOneEquityIncentiveAwardPlanMember" name="TwoThousandTwentyOneEquityIncentiveAwardPlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
</xsd:schema>
