Your Query returns 10 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Map2k2NM_02313810090MK2    MEK2    Prkmk2    601263
Map2k2NW_04777310116
Map2k2NM_13328310116Prkmk2   
MAP2K2BC0186459606MEK2    PRKMK2    MKK2    MAPKK2    601263
MAP2K2NM_0306629606MEK2    MKK2    MAPKK2    PRKMK2    601263
Map2k2NT_03949610090601263
Map2k2BC01483010090MEK2    MK2    601263
MAP2K2AY33572132630
MAP2K2BC0004719606MEK2    PRKMK2    MKK2    MAPKK2    601263
MAP2K2NT_0112559606601263

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

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Text2Knowledge ... Yong Huang 2002