Your Query returns 3 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
hoxb6aNM_1311157955Z-3    hoxb1    hoxb3a    hoxb4a    hoxb5a    hoxb7a    hoxb8a    hoxb1a   
hoxb6aNM_1311197955ZF22    z-39    ZF-22    hoxb6    hox-B6    hox-2.2   
hoxb6aAL6457827955

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

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Text2Knowledge ... Yong Huang 2002