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        <Desc>MISCELLANEOUS</Desc>
        <TotalAmt>1914</TotalAmt>
        <ManagementAndGeneralAmt>1914</ManagementAndGeneralAmt>
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      <OtherExpensesGrp>
        <Desc>COMPLIANCE FEES</Desc>
        <TotalAmt>478</TotalAmt>
        <ManagementAndGeneralAmt>218</ManagementAndGeneralAmt>
        <FundraisingAmt>260</FundraisingAmt>
      </OtherExpensesGrp>
      <TotalFunctionalExpensesGrp>
        <TotalAmt>1323859</TotalAmt>
        <ProgramServicesAmt>1253690</ProgramServicesAmt>
        <ManagementAndGeneralAmt>64371</ManagementAndGeneralAmt>
        <FundraisingAmt>5798</FundraisingAmt>
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      <CashNonInterestBearingGrp>
        <BOYAmt>1648170</BOYAmt>
        <EOYAmt>1337910</EOYAmt>
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      <AccountsReceivableGrp>
        <BOYAmt>44232</BOYAmt>
        <EOYAmt>26405</EOYAmt>
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      <PrepaidExpensesDefrdChargesGrp>
        <BOYAmt>8990</BOYAmt>
        <EOYAmt>3304</EOYAmt>
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      <TotalAssetsGrp>
        <BOYAmt>1701392</BOYAmt>
        <EOYAmt>1367619</EOYAmt>
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      <AccountsPayableAccrExpnssGrp>
        <BOYAmt>99962</BOYAmt>
        <EOYAmt>349521</EOYAmt>
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      <DeferredRevenueGrp>
        <EOYAmt>5000</EOYAmt>
      </DeferredRevenueGrp>
      <TotalLiabilitiesGrp>
        <BOYAmt>99962</BOYAmt>
        <EOYAmt>354521</EOYAmt>
      </TotalLiabilitiesGrp>
      <OrganizationFollowsFASB117Ind>X</OrganizationFollowsFASB117Ind>
      <NoDonorRestrictionNetAssetsGrp>
        <BOYAmt>1601430</BOYAmt>
        <EOYAmt>1013098</EOYAmt>
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      <TotalNetAssetsFundBalanceGrp>
        <BOYAmt>1601430</BOYAmt>
        <EOYAmt>1013098</EOYAmt>
      </TotalNetAssetsFundBalanceGrp>
      <TotLiabNetAssetsFundBalanceGrp>
        <BOYAmt>1701392</BOYAmt>
        <EOYAmt>1367619</EOYAmt>
      </TotLiabNetAssetsFundBalanceGrp>
      <ReconcilationRevenueExpnssAmt>-588332</ReconcilationRevenueExpnssAmt>
      <OtherChangesInNetAssetsAmt>0</OtherChangesInNetAssetsAmt>
      <InfoInScheduleOPartXIIInd>X</InfoInScheduleOPartXIIInd>
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>0</AccountantCompileOrReviewInd>
      <FSAuditedInd>1</FSAuditedInd>
      <FSAuditedBasisGrp>
        <SeparateBasisFinclStmtInd>X</SeparateBasisFinclStmtInd>
      </FSAuditedBasisGrp>
      <AuditCommitteeInd>1</AuditCommitteeInd>
      <FederalGrantAuditRequiredInd>0</FederalGrantAuditRequiredInd>
    </IRS990>
    <IRS990ScheduleA documentId="RetDoc1039100001">
      <PublicOrganization170Ind>X</PublicOrganization170Ind>
      <GiftsGrantsContriRcvd170Grp>
        <CurrentTaxYearMinus4YearsAmt>112356</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>300412</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>587683</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>1830890</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>518159</CurrentTaxYearAmt>
        <TotalAmt>3349500</TotalAmt>
      </GiftsGrantsContriRcvd170Grp>
      <TotalCalendarYear170Grp>
        <CurrentTaxYearMinus4YearsAmt>112356</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>300412</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>587683</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>1830890</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>518159</CurrentTaxYearAmt>
        <TotalAmt>3349500</TotalAmt>
      </TotalCalendarYear170Grp>
      <SubstantialContributorsTotAmt>499580</SubstantialContributorsTotAmt>
      <PublicSupportTotal170Amt>2849920</PublicSupportTotal170Amt>
      <TotalSupportAmt>3349500</TotalSupportAmt>
      <PublicSupportCY170Pct>0.85080</PublicSupportCY170Pct>
      <PublicSupportPY170Pct>0.85080</PublicSupportPY170Pct>
      <ThirtyThrPctSuprtTestsCY170Ind>X</ThirtyThrPctSuprtTestsCY170Ind>
    </IRS990ScheduleA>
    <IRS990ScheduleB documentId="RetDoc1234500001">
      <ContributorInformationGrp>
        <ContributorNum>RESTRICTED</ContributorNum>
        <ContributorBusinessName>
          <BusinessNameLine1>RESTRICTED</BusinessNameLine1>
        </ContributorBusinessName>
        <ContributorUSAddress>
          <AddressLine1>RESTRICTED</AddressLine1>
          <AddressLine2>RESTRICTED</AddressLine2>
          <City>RESTRICTED</City>
          <State>RESTRICTED</State>
          <ZIPCode>RESTRICTED</ZIPCode>
        </ContributorUSAddress>
        <TotalContributionsAmt>RESTRICTED</TotalContributionsAmt>
      </ContributorInformationGrp>
    </IRS990ScheduleB>
    <IRS990ScheduleD documentId="RetDoc1040000001">
      <TotalBookValueLandBuildingsAmt>0</TotalBookValueLandBuildingsAmt>
      <FootnoteTextInd>X</FootnoteTextInd>
      <TotalRevEtcAuditedFinclStmtAmt>763539</TotalRevEtcAuditedFinclStmtAmt>
      <DonatedServicesAndUseFcltsAmt>24000</DonatedServicesAndUseFcltsAmt>
      <OtherRevenueAmt>4012</OtherRevenueAmt>
      <RevenueNotReportedAmt>28012</RevenueNotReportedAmt>
      <RevenueSubtotalAmt>735527</RevenueSubtotalAmt>
      <RevenueNotReportedFinclStmtAmt>0</RevenueNotReportedFinclStmtAmt>
      <TotalRevenuePerForm990Amt>735527</TotalRevenuePerForm990Amt>
      <TotExpnsEtcAuditedFinclStmtAmt>1351871</TotExpnsEtcAuditedFinclStmtAmt>
      <DonatedServicesUseFcltsAmt>24000</DonatedServicesUseFcltsAmt>
      <OtherExpensesIncludedAmt>4012</OtherExpensesIncludedAmt>
      <ExpensesNotReportedAmt>28012</ExpensesNotReportedAmt>
      <ExpensesSubtotalAmt>1323859</ExpensesSubtotalAmt>
      <ExpensesNotRptFinclStmtAmt>0</ExpensesNotRptFinclStmtAmt>
      <TotalExpensesPerForm990Amt>1323859</TotalExpensesPerForm990Amt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION IS EXEMPT FROM FEDERAL AND STATE INCOME TAXES UNDER SECTION 501(C)(3) OF THE INTERNAL REVENUE CODE AND THEREFORE HAS MADE NO PROVISION FOR INCOME TAXES IN THE ACCOMPANYING FINANCIAL STATEMENTS. THE ORGANIZATION HAS ANALYZED TAX POSITIONS TAKEN FOR FILING WITH THE INTERNAL REVENUE SERVICE AND THE STATE JURISDICTIONS FOR WHICH IT HAS NEXUS. THE ORGANIZATION BELIEVES THAT INCOME TAX FILING POSITIONS WILL BE SUSTAINED UPON EXAMINATION AND DOES NOT ANTICIPATE ANY ADJUSTMENTS THAT WOULD RESULT IN A MATERIAL ADVERSE EFFECT ON THE ORGANIZATION'S FINANCIAL CONDITION, RESULTS OF OPERATIONS OR CASH FLOWS. ACCORDINGLY, THE ORGANIZATION HAS NOT RECORDED ANY RESERVES, OR RELATED ACCRUALS FOR INTEREST AND PENALTIES FOR UNCERTAIN INCOME TAX POSITIONS AT DECEMBER 31, 2022. THE ORGANIZATION IS SUBJECT TO ROUTINE AUDITS BY TAXING JURISDICTIONS; HOWEVER, THERE ARE CURRENTLY NO AUDITS FOR ANY TAX PERIODS IN PROGRESS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XI, LINE 2D - OTHER ADJUSTMENTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>FUNDRAISER EXPENSES 4,012.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XII, LINE 2D - OTHER ADJUSTMENTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>FUNDRAISER EXPENSES 4,012.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleD>
    <IRS990ScheduleF documentId="RetDoc1040500001">
      <GrantRecordsMaintainedInd>0</GrantRecordsMaintainedInd>
      <SubtotalOfficesCnt>0</SubtotalOfficesCnt>
      <SubtotalEmployeesCnt>0</SubtotalEmployeesCnt>
      <ContinuationTotalOfficeCnt>0</ContinuationTotalOfficeCnt>
      <ContinuationTotalEmployeeCnt>0</ContinuationTotalEmployeeCnt>
      <TotalOfficeCnt>0</TotalOfficeCnt>
      <TotalEmployeeCnt>0</TotalEmployeeCnt>
      <SubtotalSpentAmt>0</SubtotalSpentAmt>
      <ContinuationSpentAmt>0</ContinuationSpentAmt>
      <TotalSpentAmt>0</TotalSpentAmt>
      <GrantsToOrgOutsideUSGrp>
        <RegionTxt>VUMC</RegionTxt>
        <PurposeOfGrantTxt>TO FUND NATURAL HISTORY STUDY</PurposeOfGrantTxt>
        <CashGrantAmt>167413</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
      </GrantsToOrgOutsideUSGrp>
      <TotalOtherOrgCnt>1</TotalOtherOrgCnt>
      <TransferToForeignCorpInd>0</TransferToForeignCorpInd>
      <InterestInForeignTrustInd>0</InterestInForeignTrustInd>
      <ForeignCorpOwnershipInd>0</ForeignCorpOwnershipInd>
      <PassiveForeignInvestmestCoInd>0</PassiveForeignInvestmestCoInd>
      <ForeignPartnershipInd>0</ForeignPartnershipInd>
      <BoycottCountriesInd>0</BoycottCountriesInd>
    </IRS990ScheduleF>
    <IRS990ScheduleG documentId="RetDoc1041300001">
      <FundraisingEventInformationGrp>
        <Event1Nm>5K RACES</Event1Nm>
        <GrossReceiptsEvent1Amt>51056</GrossReceiptsEvent1Amt>
        <CharitableContriEvent1Amt>47044</CharitableContriEvent1Amt>
        <GrossRevenueEvent1Amt>4012</GrossRevenueEvent1Amt>
        <CashPrizesEvent1Amt>0</CashPrizesEvent1Amt>
        <NonCashPrizesEvent1Amt>3618</NonCashPrizesEvent1Amt>
        <RentFacilityCostsEvent1Amt>65</RentFacilityCostsEvent1Amt>
        <OtherDirectExpensesEvent1Amt>329</OtherDirectExpensesEvent1Amt>
        <GrossReceiptsTotalAmt>51056</GrossReceiptsTotalAmt>
        <CharitableContributionsTotAmt>47044</CharitableContributionsTotAmt>
        <GrossRevenueTotalEventsAmt>4012</GrossRevenueTotalEventsAmt>
        <NonCashPrizesTotalEventsAmt>3618</NonCashPrizesTotalEventsAmt>
        <RentFcltyCostsTotalEventsAmt>65</RentFcltyCostsTotalEventsAmt>
        <OthDirectExpnssTotalEventsAmt>329</OthDirectExpnssTotalEventsAmt>
        <DirectExpenseSummaryEventsAmt>4012</DirectExpenseSummaryEventsAmt>
        <NetIncomeSummaryAmt>0</NetIncomeSummaryAmt>
      </FundraisingEventInformationGrp>
    </IRS990ScheduleG>
    <IRS990ScheduleI documentId="RetDoc1041900001">
      <GrantRecordsMaintainedInd>0</GrantRecordsMaintainedInd>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>UNIVERSITY OF PENNSYLVANIA - HELLER LAB</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>3400 CIVIC CENTER BOULEVARD</AddressLine1Txt>
          <AddressLine2Txt>BUILDING 421</AddressLine2Txt>
          <CityNm>PHILADELPHIA</CityNm>
          <StateAbbreviationCd>PA</StateAbbreviationCd>
          <ZIPCd>191045158</ZIPCd>
        </USAddress>
        <RecipientEIN>231352685</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>38688</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>TO FUND RESEARCH</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>CHILDREN'S HOSPITAL OF PHILADELPHIA</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>3401 CIVIC CENTER BOULEVARD</AddressLine1Txt>
          <CityNm>PHILADELPHIA</CityNm>
          <StateAbbreviationCd>PA</StateAbbreviationCd>
          <ZIPCd>19104</ZIPCd>
        </USAddress>
        <RecipientEIN>231352166</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>50000</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>TO FUND RESEARCH</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>WEILL CORNELL MEDICINE</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>1300 YORK AVENUE</AddressLine1Txt>
          <CityNm>NEW YORK</CityNm>
          <StateAbbreviationCd>NY</StateAbbreviationCd>
          <ZIPCd>10065</ZIPCd>
        </USAddress>
        <RecipientEIN>136094042</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>82500</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>TO FUND CLINICAL TRIAL</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>CHILDREN'S HOSPITAL COLORADO</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>13123 E 16TH AVE</AddressLine1Txt>
          <CityNm>AURORA</CityNm>
          <StateAbbreviationCd>CO</StateAbbreviationCd>
          <ZIPCd>80045</ZIPCd>
        </USAddress>
        <RecipientEIN>454182666</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>104399</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>TO FUND RESEARCH</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>UPLIIFTING ATHLETES</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>8 ATKINSON DRIVE UNIT 574</AddressLine1Txt>
          <CityNm>DOYLESTOWN</CityNm>
          <StateAbbreviationCd>PA</StateAbbreviationCd>
          <ZIPCd>18901</ZIPCd>
        </USAddress>
        <RecipientEIN>341986485</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>10000</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>TO FUND RESEARCH</PurposeOfGrantTxt>
      </RecipientTable>
      <RecipientTable>
        <RecipientBusinessName>
          <BusinessNameLine1Txt>BAYLOR COLLEGE OF MEDICINE</BusinessNameLine1Txt>
        </RecipientBusinessName>
        <USAddress>
          <AddressLine1Txt>ONE BAYLOR PLAZA</AddressLine1Txt>
          <CityNm>HOUSTON</CityNm>
          <StateAbbreviationCd>TX</StateAbbreviationCd>
          <ZIPCd>77030</ZIPCd>
        </USAddress>
        <RecipientEIN>741613878</RecipientEIN>
        <IRCSectionDesc>501(C)(3)</IRCSectionDesc>
        <CashGrantAmt>100000</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
        <PurposeOfGrantTxt>TO FUND RESEARCH</PurposeOfGrantTxt>
      </RecipientTable>
    </IRS990ScheduleI>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART III, LINE 2</FormAndLineReferenceDesc>
        <ExplanationTxt>THE FOUNDATION LAUNCHED A LONGITUDINAL MULTI SITE NATURAL HISTORY STUDY FOR PATIENTS. THE FOUNDATION ALSO FUNDED MULTIPLE PRECLINICAL GRANTS TO VARIOUS ORGANIZATIONS TO FURTHER RESEARCH AROUND STXBP1. FUTHERMORE, THE FOUNDATION HOSTED AN IN PERSON STXBP1 SUMMIT+ TO UPDATE FAMILIES ON CURRENT RESEARCH, AS WELL AS PROVIDE ADDITIONAL RESOURCES TO BE USED IN EVERYDAY LIFE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART V, LINE 1C:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION DID NOT HAVE ANY INSTANCES WHERE BACKUP WITHHOLDING WAS REQUIRED; HOWEVER, IF THE SITUATION WOULD ARISE, THE ORGANIZATION IS AWARE OF THE REPORTING REQUIREMENTS AND WOULD HANDLE THAT ACCORDINGLY.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE FORM 990 IS REVIEWED BY THE TREASURER AND PRESIDENT PRIOR TO SUBMISSION TO THE IRS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>EACH DIRECTOR, PRINCIPAL OFFICER AND MEMBER OF A COMMITTEE WITH GOVERNING BOARD DELEGATED POWERS SHALL ANNUALLY SIGN A STATEMENT WHICH AFFIRMS SUCH PERSON HAS RECEIVED A COPY OF THE POLICY, READ AND UNDERSTANDS THE POLICY, AGREES TO COMPLY, AND UNDERSTANDS THAT THE CORPORATION MUST ENGAGE PRIMARILY IN ACTIVITIES WHICH ACCOMPLISH ONE OR MORE OF ITS TAX-EXEMPT PURPOSES TO MAINTAIN ITS FEDERAL TAX EXEMPTION. TO ENSURE THE CORPORATION OPERATES IN A MANNER CONSISTENT WITH CHARITABLE PURPOSES AND DOES NOT ENGAGE IN ACTIVITIES THAT COULD JEOPARDIZE ITS TAX-EXEMPT STATUS, PERIODIC REVIEWS SHALL BE CONDUCTED.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>YES, THE ORGANIZATION'S OWN WEBSITE.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART IX, LINE 11G</FormAndLineReferenceDesc>
        <ExplanationTxt>OTHER RESEARCH COSTS: PROGRAM SERVICE EXPENSES 716,925. MANAGEMENT AND GENERAL EXPENSES 0. FUNDRAISING EXPENSES 0. TOTAL EXPENSES 716,925.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XII, LINE 2C</FormAndLineReferenceDesc>
        <ExplanationTxt>FINANCE COMMITEE; NO CHANGE</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>