Your Query returns 4 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Caspr2BC02982610090Cntnap2    604569
Caspr2BC06446710090Cntnap2    604569
CASPR2NM_0141419606NRXN4    CNTNAP2    604569
CASPR2AF1936139606604569

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

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Text2Knowledge ... Yong Huang 2002