Your Query returns 43 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
tnnt2AF2823847955
tnnt2AF5125257955
tnnt2AF4341877955
tnnt2NM_1528937955cTnT    zeh0954    troponin   
Tnnt2NM_01161910090Tnt    cTnT    191045
Tnnt2NW_04739510116
TNNT2AH0064879606191045
TNNT2AF0044099606191045
TNNT2AF0044109606191045
TNNT2AF0044119606191045
TNNT2AF0044129606191045
TNNT2AF0044139606191045
TNNT2AF0044149606191045
TNNT2AF0044159606191045
TNNT2AF0044169606191045
TNNT2AF0044179606191045
TNNT2AF0044189606191045
TNNT2AF0044199606191045
TNNT2AF0044209606191045
TNNT2AF0044219606191045
TNNT2AF0044229606191045
TNNT2AY1602159606191045
TNNT2AY1602169606191045
TNNT2BC0026539606CMH2    CMD1D    191045
TNNT2X984789606191045
TNNT2X984799606191045
TNNT2X984809606191045
TNNT2X984829606191045
TNNT2X984839606191045
TNNT2X984779606191045
TNNT2X984819606191045
TNNT2Y096269606191045
TNNT2Y096279606191045
TNNT2Y096289606191045
TNNT2AY0442739606CMH2    191045
TNNT2NM_0003649606CMH2    CMD1D    191045
TNNT2AB05289010090191045
TNNT2NM_1747719913
Tnnt2NT_03918010090191045
tnnt2AL6628787955
tnnt2AL6628807955
TNNT2NT_0046719606191045
Tnnt2NM_01267610116Ctt    CTTG    Tnnt3    RATCTTG   

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* OMIM link based on symbol match for human and mouse.

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Text2Knowledge ... Yong Huang 2002