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CD1 (cluster of differentiation 1) is a family of glycoproteins expressed on the surface of various human antigen-presenting cells.CD1 glycoproteins are structurally related to the class I MHC molecules, however, in contrast to MHC class 1 proteins, they present lipids, glycolipids and small molecules antigens, from both endogenous and pathogenic proteins, to T cells and activate an immune ...
The CD nomenclature was proposed and established in the 1st International Workshop and Conference on Human Leukocyte Differentiation Antigens (HLDA), held in Paris in 1982. [4] [5] This system was intended for the classification of the many monoclonal antibodies (mAbs) generated by different laboratories around the world against epitopes on the surface molecules of leukocytes (white blood cells).
Also known as Lymphocyte antigen 75 (LY75), a protein that in humans is encoded by the LY75 gene. Also known as DEC-205. CD206: Also known as Mannose receptor C-type 1 (MC1) and present on the surface of macrophages, immature dendritic cells, and surface of skin cells such as human dermal fibroblasts and keratinocytes. Additional functions ...
CD1d-presented lipid antigens activate a special class of T cells, known as natural killer T (NKT) cells, through the interaction with the T-cell receptor present on NKT membranes. [5] When activated, NKT cells rapidly produce Th1 and Th2 cytokines , typically represented by interferon-gamma and interleukin 4 production.
B-lymphocyte antigen CD19, also known as CD19 molecule (Cluster of Differentiation 19), B-Lymphocyte Surface Antigen B4, T-Cell Surface Antigen Leu-12 and CVID3 is a transmembrane protein that in humans is encoded by the gene CD19. [5] [6] In humans, CD19 is expressed in all B lineage cells.
Signal transducer CD24 also known as cluster of differentiation 24 or heat stable antigen CD24 (HSA) is a protein that in humans is encoded by the CD24 gene. [5] CD24 is a cell adhesion molecule . Function
CD38 (cluster of differentiation 38), also known as cyclic ADP ribose hydrolase, is a glycoprotein [5] found on the surface of many immune cells (white blood cells), including CD4 +, CD8 +, B lymphocytes and natural killer cells. CD38 also functions in cell adhesion, signal transduction and calcium signaling. [6]
PECAM-1 is a highly glycosylated protein with a mass of approximately 130 kDa. [9] The structure of this protein was determined by molecular cloning in 1990, when it was found out that PECAM-1 has an N-terminal domain with 574 amino acids, a transmembrane domain with 19 amino acids and a C-terminal cytoplasmic domain with 118 amino acids.