Your Query returns 6 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
pp90rskXM_12300310090Rsk3    Rps6ka2   
pp90rskBC05107910090Rsk3    90kDa    Rps6ka2   
pp90rskBC05694610090Rsk3    90kDa    Rps6ka2   
pp90rskBC05533110090Rsk3    90kDa    Rps6ka2   
pp90rskBC04306410090Rsk3    90kDa    Rps6ka2   
pp90rskNM_01129910090Rsk3    90kDa    p90rsk    D17Wsu134e    Rps6ka-rs1    Rps6ka2   

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

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Text2Knowledge ... Yong Huang 2002