Your Query returns 7 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
DEFB2NM_0049429606SAP1    HBD-2    DEFB-2    DEFB102    DEFB4    602215
Defb2NM_01003010090602215
Defb2NW_04747510116
DEFB2AF0401539606602215
Defb2NT_03945610090602215
defb2AJ01180010090602215
Defb2NM_02254410116

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

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Text2Knowledge ... Yong Huang 2002