Your Query returns 7 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
GAP-43NM_00808310090B-50    Basp2    Gap43   
GAP-43XM_14725910090B-50    Basp2   
GAP-43BC02828810090B-50    Gap43   
GAP-43AH00217510116
GAP-43L2119010116
GAP-43L2119210116
GAP-43U754539135

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

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Text2Knowledge ... Yong Huang 2002