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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]
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).
CD38 on leukocytes attaching to CD16 on endothelial cells allows for leukocyte binding to blood vessel walls, and the passage of leukocytes through blood vessel walls. [11] CD16 is often used as an additional marker to reliably identify different subsets of human immune cells. [12]
Cluster of differentiation 40, CD40 is a type I transmembrane protein found on antigen-presenting cells and is required for their activation. The binding of CD154 on T H cells to CD40 activates antigen presenting cells and induces a variety of downstream effects.
Bst1 (Bone marrow stromal cell antigen 1, ADP-ribosyl cyclase 2, CD157) is an enzyme that in humans is encoded by the BST1 gene. [5] [6] [7] CD157 is a paralog of CD38, both of which are located on chromosome 4 (4p15) in humans.
We have our anti-CD38. We are expected to enter into three phase 3 trials in three separate indications with auto antibody-mediated resistance, IgAN, the PMN. And we have very compelling phase 2 ...
Using Kyte–Doolittle analysis, [25] the amino acid sequence of CD36 predicts a hydrophobic region near each end of the protein large enough to span cellular membranes.Based on this notion and the observation that CD36 is found on the surface of cells, CD36 is thought to have a 'hairpin-like' structure with α-helices at the C- and N- termini projecting through the membrane and a larger ...
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