Your Query returns 6 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
p41mapkNM_01194910090ERK    Erk2    MAPK2    PRKM2    Prkm1    p42mapk    9030612K14Rik    Mapk1   
p41mapkBC0178329606ERK    ERK2    PRKM1    P42MAPK    MAPK2    PRKM2    ERT1    p40    p41    p38    MAPK1   
p41mapkNM_0027459606ERK    p38    p40    p41    ERK2    ERT1    MAPK2    PRKM1    PRKM2    P42MAPK    MAPK1   
p41mapkNM_1389579606ERK    p38    p40    p41    ERK2    ERT1    MAPK2    PRKM1    PRKM2    P42MAPK    MAPK1   
p41mapkBC00670810090Prkm1    ERK    Erk2    MAPK2    PRKM2    p42mapk    9030612K14Rik    Mapk1   
p41mapkBC05825810090ERK    MAPK2    PRKM2    p42mapk    Mapk1   

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

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Text2Knowledge ... Yong Huang 2002