Your Query returns 5 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Pkg21DAY0582887227
Pkg21DNG_0005697227DG1    PKG    Pkg1    cGMP    CG3324    CT10911    PKG 21D   
Pkg21DAE0035887227
Pkg21DNM_0578657227DG1    PKG    Pkg1    cGMP    CG3324   
Pkg21DNT_0337797227DG1    PKG    Pkg1    cGMP    CG3324   

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

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Text2Knowledge ... Yong Huang 2002