Your Query returns 8 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Cdkl2NM_17727010090Kkm    KKIAMRE    5330436L21Rik   
Cdkl2NM_01691210090Kkm    KKIAMRE    5330436L21Rik   
CDKL2AY4121409606
CDKL2AY4121419598
CDKL2AY41214210090
CDKL2NM_0039489606P56    KKIAMRE   
Cdkl2NT_03930810090
CDKL2NT_0163549606

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

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Text2Knowledge ... Yong Huang 2002