Your Query returns 13 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
ACK1NM_01678810090Ack    Cdgip    MGC37479    Tnk2    606994
ACK1BC03116810090Ack    Cdgip    MGC37479    Tnk2    606994
ACK1BC05242110090Ack    Cdgip    MGC37479    Tnk2    606994
ack1AL935252220668
ACK1AF1067053702
ACK1AF2086923702
ACK1BC0088849606ACK    606994
ACK1BC0281649606ACK    606994
ACK1L137389606606994
ACK1NM_1738859913ACK   
ACK1NM_0057819606ACK    606994
ACK1NT_0299289606606994
ack1NC_004567220668

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

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Text2Knowledge ... Yong Huang 2002