NCIt definition : A transmembrane heterodimer consisting of B-cell antigen receptor complex-associated
protein alpha chain (CD79A) and B-cell antigen receptor complex-associated protein
beta chain (CD79B). CD79 is expressed almost exclusively on B cells and B-cell neoplasms
and its presence is useful in the differential diagnosis of B-cell neoplasms from
T-cell neoplasms or myeloid neoplasms.;