Your Query returns 9 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
MEK3NM_00892810090MKK3    Prkmk3    mMKK3b    Map2k3    602315
MEK3BC0324789606MKK3    PRKMK3    MAPKK3    MAP2K3    602315
Mek3NG_0005237227MKK3    Mpk3    DMEK3    DMKK3    D-MKK3    CG12244    CT14280    p38MAPKK    DMKK3/lic    MEK3/MKK3    lic   
MEK3NM_0027569606MKK3    MAPKK3    PRKMK3    MAP2K3    602315
MEK3NM_1451099606MKK3    MAPKK3    PRKMK3    MAP2K3    602315
MEK3NM_1451109606MKK3    MAPKK3    PRKMK3    MAP2K3    602315
MEK3BC00746710090MKK3    mMKK3b    Map2k3    602315
Mek3NC_0043547227p38    MKK3    Mpk3    DMEK3    DMKK3    D-MKK3    CG12244    p38MAPKK    DMKK3/lic    MEK3/MKK3    l(1)G0252    lic   
Mek3NM_0578147227p38    MKK3    Mpk3    DMEK3    DMKK3    D-MKK3    CG12244    p38MAPKK    DMKK3/lic    MEK3/MKK3    l(1)G0252    lic   

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

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