Your Query returns 7 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Mek4NM_01014010090Hek    Cek4    ETK1    Hek4    Tyro4    Epha3   
MEK4NM_00915710090MKK4    Sek1    JNKK1    Serk1    PRKMK4    Map2k4   
MEK4BC0360329606JNKK1    PRKMK4    SERK1    MKK4    MAPKK4    SEK1    JNKK    MAP2K4   
MEK4BC0607649606JNKK1    PRKMK4    SERK1    MKK4    MAPKK4    SEK1    JNKK    MAP2K4   
MEK4NM_0030109606JNKK    MKK4    SEK1    JNKK1    SERK1    MAPKK4    PRKMK4    MAP2K4   
MEK4BC02983310090MKK4    Sek1    JNKK1    PRKMK4    Map2k4   
Mek4M6851310090

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

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Text2Knowledge ... Yong Huang 2002