Your Query returns 6 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
CD154NM_01161610090IGM    IMD3    Ly62    TRAP    gp39    Cd40l    HIGM1    Ly-62    T-BAM    CD40LG    Tnfsf5   
CD154NM_0000749606IGM    IMD3    TRAP    gp39    CD40L    HIGM1    T-BAM    CD40LG    hCD40L    TNFSF5   
CD154AF0791059685
CD154AY3337909615
CD154AJ2434359031
CD154NM_2047339031

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

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Text2Knowledge ... Yong Huang 2002