Your Query returns 6 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
MAT-IIBC0052189606TGR    MGC12237    MATIIbeta    MAT2B   
MAT-IINM_0132839606TGR    MGC12237    MATIIbeta    MAT2B   
MAT-IINM_1827969606TGR    MGC12237    MATIIbeta    MAT2B   
MAT-IIBC00345710090MATIIbeta    TGR    Mat2b   
MAT-IINM_13401710090TGR    MATIIbeta    2410018D16Rik    Mat2b   
MAT-IIBC0666459606TGR    MGC12237    MATIIbeta    MAT2B   

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

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Text2Knowledge ... Yong Huang 2002