Your Query returns 7 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Krox20NM_01011810090Egr-2    Zfp-6    NGF1-B    Zfp-25    Krox-20    Egr2    129010
krox20NM_13099779555073    egr2    cb427    krx20    KRX-20    fb71h10    id:ibd5073    wu:fb71h10    egr2b   
KROX20BC0356259606CMT1D    CMT4E    EGR2    129010
KROX20NM_0003999606CMT1D    CMT4E    EGR2    129010
Krox20BC00909310090Zfp-6    NGF1-B    Egr2    129010
Krox20NM_05363310116Egr2   
KROX20AF2917479031

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

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Text2Knowledge ... Yong Huang 2002