Your Query returns 9 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
MAT2BBC0052189606MAT-II    TGR    MGC12237    MATIIbeta   
MAT2BAY0338229606
MAT2BNM_0132839606TGR    MAT-II    MGC12237    MATIIbeta   
MAT2BNM_1827969606TGR    MAT-II    MGC12237    MATIIbeta   
MAT2BAB07026710090
Mat2bBC00345710090MATIIbeta    TGR    MAT-II   
MAT2BNT_0231339606
Mat2bNM_13401710090TGR    MAT-II    MATIIbeta    2410018D16Rik   
MAT2BBC0666459606MAT-II    TGR    MGC12237    MATIIbeta   

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

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Text2Knowledge ... Yong Huang 2002