Your Query returns 5 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Msk2NM_0199241009090kDa    mMSK2    1110069D02Rik    Rps6ka4   
MSK2BC0478969606RSK-B    RSKB    RPS6KA4   
MSK2NM_0039429606RSKB    RSK-B    RPS6KA4   
Msk2BC01296410090mMSK2    90kDa    Rps6ka4   
MSK2AF0747159606

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

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Text2Knowledge ... Yong Huang 2002