Your Query returns 10 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
mb-1NM_00765510090Iga    Ly54    Ly-54    Cd79a   
MB-1NM_0017839606IGA    CD79A   
MB-1NM_0216019606IGA    CD79A   
MB-1NM_1742669913CD79A   
mb-1BC02763310090Cd79a   
MB-1U052599606
MB-1M804629606
MB-1M747219606
mb-1S752179606
mb-1S467069606

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

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Text2Knowledge ... Yong Huang 2002