Your Query returns 8 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
MekkNM_01194510090MEKK1    MAPKKK1    Map3k1    600982
MEKKNM_1424937227MEKK4    dMEKK    CG7717    mekk1a    mekk1b    D-MEKK1    DmMEKK1    Mekk1   
MEKKNM_1698337227MEKK4    dMEKK    CG7717    mekk1a    mekk1b    D-MEKK1    DmMEKK1    Mekk1   
MEKKNT_0337777227MEKK4    dMEKK    CG7717    mekk1a    mekk1b    D-MEKK1    DmMEKK1    Mekk1   
MekkU296719606600982
MekkU2966910092
MekkU2967039442
MekkU2967210092

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

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Text2Knowledge ... Yong Huang 2002