CD79 is a disulphide-linked transmembrane heterodimer with a molecular mass of 82-95 kDa belonging to the immunoglobulin superfamily. It comprises the two glycoproteins, CD79α, with a molecular mass of 40-45 kDa, and CD79β, with a molecular mass of 37 kDa. CD79 is non-covalently associated with surface Ig, forming the B-cell receptor complex, which is required for antigen recognition. The expression of CD79 is largely restricted to B-lineage cells (Pilozzi,1998). In precursor B cells, the CD79 protein chains are already expressed in the cytoplasm (CyCD79). Surface expression of CD79 begins at the pro-B cell stage and persists throughout the B-cell differentiation. CD79α is more strongly expressed by B cells in the follicular mantle zone than by germinal centre B cells, suggesting that activation of mature B cells downregulates CD79 expression. CD79 expression ceases around the onset of plasma cell differentiation, with only a proportion of plasma cells containing CD79 (Comans-Bitter, 1997)(Nakamura, 1997). The HM57 antibody was clustered as Anti-CD79αcy at the Fifth International Workship on Human Leucocyte Differentiation Antigens (Engel, 1995).，官网链接：https://www.sigmaaldrich.cn/product/mm/fcmab208p 默克 科研、开发、生产。 作为生命科学行业的全球领先供应商，我们致力于为科研、生物技术开发和生产，以及制药药物疗法开发和生产提供各类解决方案和服务。

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