Your Query returns 5 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
sek2NM_01194410090MKK7    Jnkk2    Prkmk7    5930412N11Rik    Map2k7   
Sek2NM_01013910090Eck    Myk2    Sek-2    Epha2   
Sek2BC00695410090Sek-2    Myk2    Epha2   
sek2AP004828196620
sek2NC_003923196620

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

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Text2Knowledge ... Yong Huang 2002