Your Query returns 3 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Dbeta3NM_0803597227nAChR    CG11822    nAcRbeta-21C   
Dbeta3NM_1643867227nAChR    CG11822    nAcRbeta-21C   
Dbeta3NT_0337797227nAChR    CG11822    nAcRbeta-21C   

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

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Text2Knowledge ... Yong Huang 2002