Description_x000D_ General description_x000D_ Cluster of differentiation 28 (CD 28) is a lymphocyte surface protein. In human chromosome, the gene CD28 is localized on 2q33.2. The antibody CD28.2 reacts with CD28, a disulfide-linked homodimeric type I glycoprotein (monomer of Mw 44 kDa) which is a critical costimulatory receptor of T cells. HLDA V.; WS Code 5T CD28.05._x000D_ Immunogen_x000D_ DC28.1.3.3 murine T cell hybridoma transfected with human CD28 cDNA_x000D_ Physical form_x000D_ Solution in phosphate buffered saline, pH 7.4, with 15 mM sodium azide._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_ Cluster of differentiation 28 (CD28) acts as a costimulatory molecule for T cell activation and proliferation. CD28 might function as a tumor suppressor gene and the polymorphism is related to increased risk of breast cancer. CD28 plays a key role in allogenic responses. The level of CD28 is upregulated in CD4+ lymphocytes during acute graft rejection. Polymorphism in CD28 owing to higher frequency of CD28 molecule has impact on schizophrenia. Mutations in CD28 is associated with T cell lymphoma′s and neoplasm, leading to accelerated tumour growth. CD28 along with phosphatidylinositol 3 kinase (PI3K) regulates diverse biochemical pathways. CD28 signals to T cells and prevents anergy and apoptosis and promotes T cell proliferation and production of interleukin-2._x000D_ Features and Benefits_x000D_ Evaluate our antibodies with complete peace of mind. If the antibody does not perform in your application, we will issue a full credit or replacement antibody. Learn more.