Your Query returns 7 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Bhlhb5BC0533127955MGC64225    zgc:64225   
Bhlhb5NM_2009557955MGC64225    zgc:64225   
Bhlhb5NM_02156010090Beta3   
Bhlhb5NT_07838010090
Bhlhb5BC05300710090Beta3   
BHLHB5NT_0081839606
BHLHB5NM_1524149606Beta3    CAGL85    TNRC20   

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

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Text2Knowledge ... Yong Huang 2002