Description_x000D_ General description_x000D_ CTLA4 (cytotoxic T-lymphocyte associated protein 4) or CD152 (cluster of differentiation) is a T cell receptor which belongs to the immunoglobulin (Ig) superfamily or CD28 family. It is expressed on the surface of Th (T helper) cells. This gene is localized to human chromosome 2q33. This protein is composed of a cytosolic domain, a transmembrane region and a V domain of 116 amino acids. Alternative splicing results in membrane and soluble forms, where membrane forms work as homodimers and soluble isoforms as monomers._x000D_ Immunogen_x000D_ purified recombinant mouse cytotoxic T-lymphocyte-associated molecule 4 extracellualr domain, expressed in mouse NSO cells._x000D_ Physical form_x000D_ Lyophilized from a 0.2 μm filtered solution in phosphate buffered saline, pH 7.4 with 5% trehalose._x000D_ Disclaimer_x000D_ Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals._x000D_ Biochem/physiol Actions_x000D_ CTLA4 (cytotoxic T-lymphocyte associated protein 4) is responsible for inhibiting T-cell proliferation and facilitates T cell apoptosis. This protein is expressed post-antigen presentation, and thus, is involved in immune and autoimmune disorders. Therefore, it is also implicated in the pathogenesis of various T cell mediated autoimmune disorders.