Your Query returns 10 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
CPNBC0278979606SCPN    CPN1    603103
CPNNM_0013089606SCPN    CPN1    603103
CPNBC01469210090Cpn1    603103
CPNNM_030703100900610011F20Rik    Cpn1    603103
CpnNM_05352610116Cpn1   
CpnAY0583157227
CpnAE0036947227
CpnNM_1694547227cap    Ag72H5    CG4795    calphotin   
CpnNM_1694557227cap    Ag72H5    CG4795    calphotin   
CpnNT_0337777227cap    Ag72H5    CG4795    calphotin   

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

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Text2Knowledge ... Yong Huang 2002