Your Query returns 7 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Mpk3NG_0005237227MKK3    Mek3    DMEK3    DMKK3    D-MKK3    CG12244    CT14280    p38MAPKK    DMKK3/lic    MEK3/MKK3    lic   
Mpk3NC_0043547227p38    MKK3    Mek3    DMEK3    DMKK3    D-MKK3    CG12244    p38MAPKK    DMKK3/lic    MEK3/MKK3    l(1)G0252    lic   
Mpk3NM_0578147227p38    MKK3    Mek3    DMEK3    DMKK3    D-MKK3    CG12244    p38MAPKK    DMKK3/lic    MEK3/MKK3    l(1)G0252    lic   
MPK3AJ2932815665
MPK3AY4262515911
MPK3AJ60816080379CchMPK3    CcMPK3   
MPK3AY2615144081

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

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Text2Knowledge ... Yong Huang 2002