Your Query returns 5 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Prkmk2NM_02313810090MK2    MEK2    Map2k2    601263
Prkmk2NM_13328310116Map2k2   
PRKMK2BC0186459606MEK2    MKK2    MAPKK2    MAP2K2    601263
PRKMK2NM_0306629606MEK2    MKK2    MAPKK2    MAP2K2    601263
PRKMK2BC0004719606MEK2    MKK2    MAPKK2    MAP2K2    601263

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

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Text2Knowledge ... Yong Huang 2002