Anti-CD4 Monoclonal Antibody (Clone:MEM-115)-Low Endotoxin(Discontinued)

Product code: 30-1595

Clone name : MEM-115
Clonality : Monoclonal
Application : IP
Reactivity : Human

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Format : Low Endotoxin
Amount : 0.1 mg
Isotype : Mouse IgG2a
Purification : Purified by protein-A affinity chromatography
Storage condition : Store at 2-8°C. Do not freeze.
Gene : CD4
Gene ID : 920
Uniprot ID : P01730
Alternative Name : CD4
Immunogen Information : Human thymocytes and T lymphocytes.

CD4 is a single chain transmembrane glycoprotein and belongs to immunoglobulin supergene family. In extracellular region there are 4 immunoglobulin-like domains (1 Ig-like V-type and 3 Ig-like C2-type). Transmembrane region forms 25 aa, cytoplasmic tail consists of 38 aa. Domains 1,2 and 4 are stabilized by disulfide bonds. The intracellular domain of CD4 is associated with p56Lck, a Src-like protein tyrosine kinase. It was described that CD4 segregates into specific detergent-resistant T-cell membrane microdomains.Extracellular ligands: MHC class II molecules (binds to CDR2-like region in CD4 domain 1); HIV envelope protein gp120 (binds to CDR2-like region in CD4 domain 1); IL-16 (binds to CD4 domain 3), Human seminal plasma glycoprotein gp17 (binds to CD4 domain 1), L-selectinIntracellular ligands: p56LckCD4 is a co-receptor involved in immune response (co-receptor activity in binding to MHC class II molecules) and HIV infection (human immunodeficiency virus; CD4 is primary receptor for HIV-1 surface glycoprotein gp120). CD4 regulates T-cell activation, T/B-cell adhesion, T-cell diferentiation, T-cell selection and signal transduction.Defects in antigen presentation (MHC class II) cause dysfunction of CD4+ T-cells and their almost complete absence in patients blood, tissue and organs (SCID immunodeficiency).

Subcellular location: Cell membrane
Post transnational modification: Phosphorylated by PKC; phosphorylation at Ser-433 plays an important role for CD4 internalization.
Tissue Specificity: Highly expressed in T-helper cells. The presence of CD4 is a hallmark of T-helper cells which are specialized in the activation and growth of cytotoxic T-cells, regulation of B cells, or activation of phagocytes. CD4 is also present in other immune cells such as macrophages, dendritic cells or NK cells.
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