Your Query returns 4 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Mlh2NG_0004107227dmlh2    dpms2    CG8169    dmlh-2    CT21953    Pms2   
Mlh2NM_0576757227pms2    dmlh2    dpms2    CG8169    dmlh-2   
Mlh2NT_0337787227pms2    dmlh2    dpms2    CG8169    dmlh-2   
MLH20N/A

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

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Text2Knowledge ... Yong Huang 2002