Your Query returns 5 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Erk-1NM_01195210090p44    Erk1    Esrk1    Prkm3    p44erk1    p44mapk    Mapk3   
Erk-1BC01375410090Prkm3    p44    p44erk1    p44mapk    Mapk3   
Erk-1BC02971210090p44    p44erk1    p44mapk    Mapk3   
Erk-1NM_01734710116p44    ERK1    Esrk1    Prkm3    p44erk1    p44mapk    Mapk3   
Erk-1S5847010095

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

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Text2Knowledge ... Yong Huang 2002