Your Query returns 3 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
MGC21585NM_14538310090Ops    RP4    Opn2    MGC25387    Rho   
MGC21585BC03176610090MGC25387    Opn2    RP4    Rho   
MGC21585BC01312510090MGC25387    Opn2    RP4    Rho   

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

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Text2Knowledge ... Yong Huang 2002