Your Query returns 5 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
ACK2NM_1396027227ACK    DACK    p145    CG14992   
ACK2NT_0374367227ACK    DACK    p145    CG14992   
ack2AL935252220668
ACK2AF1233153702
ack2NC_004567220668

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

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Text2Knowledge ... Yong Huang 2002