Your Query returns 4 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Cnp-1NM_00992310090Cnp    CNPase    Cnp1   
cnp-1AB0766018022
cnp-1AB0814558090
cnp-1AB08993531033

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

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Text2Knowledge ... Yong Huang 2002