Your Query returns 2 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Capping-protein-betaNM_0576577227CG17158    Ancpbeta    CP beta subunit    capping protein    cpb   
Capping-protein-betaNG_0003967227CG17158    CT32517    Ancpbeta    CP beta subunit    cpb   

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

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Text2Knowledge ... Yong Huang 2002