Your Query returns 4 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
rp21CNG_0000797227rpA2    CG4087    CT13554    M(2)21C    M(2)21C1-2    RpP2   
rp21CNM_0572827227RpA2    RpP2    CG4087    M(2)21C    M(2)21C1-2    RpLP1   
rp21CNT_0337797227RpA2    RpP2    CG4087    M(2)21C    M(2)21C1-2    RpLP1   
rp21CS621707227

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

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Text2Knowledge ... Yong Huang 2002