Your Query returns 3 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
mPGESNM_02241510090cPGES    D2Ertd369e    2410099E23Rik    Ptges   
mPGESBC02496010090cPGES    Ptges   
mPGESAB08334010090

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

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Text2Knowledge ... Yong Huang 2002