Your Query returns 19 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Cpne1NM_170588100901810028N16Rik   
Cpne1NM_170590100901810028N16Rik   
CPNE1BC0011429606COPN1    CPN1    MGC1142   
CPNE1AY4176399606
CPNE1AY4176409598
CPNE1AY41764110090
CPNE1AL1098279606
CPNE1AF3140929606
CPNE1NM_0039159606CPN1    COPN1    MGC1142   
CPNE1NM_1529259606CPN1    COPN1    MGC1142   
CPNE1NM_1529269606CPN1    COPN1    MGC1142   
CPNE1NM_1529279606CPN1    COPN1    MGC1142   
CPNE1NM_1529289606CPN1    COPN1    MGC1142   
CPNE1NM_1529299606CPN1    COPN1    MGC1142   
CPNE1NM_1529309606CPN1    COPN1    MGC1142   
CPNE1NM_1529319606CPN1    COPN1    MGC1142   
Cpne1NT_03921010090
Cpne1BC05755410090
CPNE1NT_0283929606

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

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Text2Knowledge ... Yong Huang 2002