Your Query returns 6 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
MgstlAF1114287227
MgstlAF1114267227
MgstlAE0035697227
MgstlNC_0043547227Mgst1    CG1742   
MgstlNM_0799577227Mgst1    CG1742   
MgstlNM_1677247227Mgst1    CG1742   

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

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Text2Knowledge ... Yong Huang 2002