Your Query returns 4 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
CDKINM_00766910090P21    CIP1    SDI1    Waf1    mda6    CAP20    Cdkn1    p21WAF    p21Cip1    Cdkn1a   
CDKINM_00987610090Kip2    p57Kip2    p57(kip2)    Cdkn1c   
CDKIBC00541210090Kip2    p57Kip2    p57(kip2)    Cdkn1c   
CDKIBC00204310090P21    CIP1    SDI1    Waf1    mda6    CAP20    p21WAF    p21Cip1    Cdkn1a   

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

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Text2Knowledge ... Yong Huang 2002