Your Query returns 15 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
dffBAF426171632
DffbNM_00785910090CAD    CPAN    40kDa    DFF40    Didff    5730477D02Rik    601883
DffbNW_04773110116
DFFBBC0487979606DFF40    CPAN    CAD    DFF2    DFF-40    601883
DFFBAF4090609606601883
DFFBAF4090619606601883
DFFBAF4090629606601883
DFFBNM_0044029606CAD    CPAN    DFF2    DFF40    DFF-40    601883
DffbNT_03926810090601883
DffbBC05305210090CAD    40kDa    601883
dffbNM_1944047955CAD   
DFFBNT_0043219606601883
DffbNM_05336210116Cad   
DFFBNM_2042859031
dffbBC0676027955CAD   

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

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Text2Knowledge ... Yong Huang 2002