Your Query returns 4 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
GABATHGNM_17870310090Gabt    Gat1    XT-1    Gabt1    Xtrp1    GABATR    A730043E01    Slc6a1   
GABATHGBC0339049606GABATR    GAT1    SLC6A1   
GABATHGNM_0030429606GAT1    GABATR    SLC6A1   
GABATHGBC05908010090A730043E01    XT-1    Gat1    GABATR    Slc6a1   

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

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Text2Knowledge ... Yong Huang 2002