Your Query returns 6 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
MATIIbetaBC0052189606MAT-II    TGR    MGC12237    MAT2B   
MATIIbetaNM_0132839606TGR    MAT-II    MGC12237    MAT2B   
MATIIbetaNM_1827969606TGR    MAT-II    MGC12237    MAT2B   
MATIIbetaBC00345710090TGR    MAT-II    Mat2b   
MATIIbetaNM_13401710090TGR    MAT-II    2410018D16Rik    Mat2b   
MATIIbetaBC0666459606MAT-II    TGR    MGC12237    MAT2B   

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

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Text2Knowledge ... Yong Huang 2002