Your Query returns 7 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
DEFB4NM_0803899606DEFB-4    DEFB104    602215
Defb4NM_01972810090MBD-4    2310001F05Rik    602215
DEFB4AJ3148349606602215
DEFB4AJ3148359606602215
DEFB4NM_0049429606SAP1    DEFB2    HBD-2    DEFB-2    DEFB102    602215
Defb4NT_03945510090602215
DEFB4NT_0775319606602215

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

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Text2Knowledge ... Yong Huang 2002