Your Query returns 5 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Prkm1NM_01194910090ERK    Erk2    MAPK2    PRKM2    p41mapk    p42mapk    9030612K14Rik    Mapk1    176948
PRKM1BC0178329606ERK    ERK2    P42MAPK    MAPK2    PRKM2    ERT1    p40    p41    p38    p41mapk    MAPK1    176948
PRKM1NM_0027459606ERK    p38    p40    p41    ERK2    ERT1    MAPK2    PRKM2    P42MAPK    p41mapk    MAPK1    176948
PRKM1NM_1389579606ERK    p38    p40    p41    ERK2    ERT1    MAPK2    PRKM2    P42MAPK    p41mapk    MAPK1    176948
Prkm1BC00670810090ERK    Erk2    MAPK2    PRKM2    p41mapk    p42mapk    9030612K14Rik    Mapk1    176948

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

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Text2Knowledge ... Yong Huang 2002