Recombinant Rabbit B7-1/CD80 (C-6His)

Source: Human cells. MW :24.5kD. Recombinant Rabbit T-lymphocyte Activation Antigen CD82 is produced by our Mammalian expression system and the target gene encoding Gly33-Gln241 is expressed with a 6His tag at the C-terminus. Cluster of Differentiation 80, also called B7-1, is a member of cell surface immunoglobulin superfamily which plays key, yet distinct roles in the activation of T cells. B7-1/CD80 and B7-2/CD86, together with their receptors CD28 and CTLA4, constitute one of the dominant co-stimulatory pathways that regulate T- and B- cell responses. CD80 is mostly expressed on the surface of antigen-presenting cells including activated B cells, macrophages and dendritic cells. Although both CTLA-4 and CD28 can bind to the same ligands, CTLA-4 binds to B7-1 and B7-2 with a 20-100 fold higher affinity than CD28 and is involved in the down-regulation of the immune response. Protein function: Involved in the costimulatory signal essential for T lymphocytes activation. T-cell proliferation and cytokine production is induced by the binding of CD28 or CTLA-4 to this receptor. [The UniProt Consortium]