CD79 ( Cluster of Differentiation 79) is a transmembrane protein that forms a complex with the B-cell receptor (BCR) and generates a signal following recognition of antigen by the BCR. CD79 is composed of two distinct chains called CD79A and CD79B (formerly known as Ig-alpha and Ig-beta); these form a heterodimer on the surface of a B cell stabilized by disulfide bonding. CD79a and CD79b are both members of the  immunoglobulin superfamily. Human CD79a is encoded by the mb-1 gene that is located on chromosome 19, and CD79b is encoded by the B29 gene that located on chromosome 17.  Both CD79 chains contain an  immunoreceptor tyrosine-based activation motif (ITAM) in their intracellular tails that they use to propagate a signal in a B cell, in a similar manner to CD3-generated signal tranduction observed during T cell receptor activation on T cells. 
References [ edit ]
^ a b Chu P, Arber D (2001). "CD79: a review". Appl Immunohistochem Mol Morphol. 9 (2): 97–106. doi: 10.1097/00022744-200106000-00001. PMID 11396639.
^ Van Noesel C, Brouns G, van Schijndel G, Bende R, Mason D, Borst J, van Lier R (1992). "Comparison of human B cell antigen receptor complexes: membrane- expressed forms of immunoglobulin (Ig)M, IgD, and IgG are associated with structurally related heterodimers". J Exp Med. 175 (6): 1511–9. doi: 10.1084/jem.175.6.1511. PMC 2119249 . PMID 1375264.
^ Müller B, Cooper L, Terhorst C (1995). "Interplay between the human TCR/CD3 epsilon and the B-cell antigen receptor associated Ig-beta (B29)". Immunol Lett. 44 (2–3): 97–103. doi: 10.1016/0165-2478(94)00199-2. PMID 7541024.
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