2. Signaling Pathways
  3. Immunology/Inflammation
  4. Complement System

Complement System

Complement System

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The complement system, composed of more than 30 serum and cell surface components, is collaborating in recognition and elimination of pathogens as a part of both the innate and acquired immune systems. Once the complement system is activated, a chain of reactions involving proteolysis and assembly occurs, resulting in cleavage of the third complement component (C3). The cascade up to C3 cleavage is called the activation pathway. There are three activation pathways: the classical, lectin, and alternative pathways.

The complement cascade is a dual-edged sword, causing protection against bacterial and viral invasion by promoting phagocytosis and inflammation. Pathologically, complement can cause substantial damage to blood vessels (vasculitis), kidney basement membrane and attached endothelial and epithelial cells (nephritis), joint synovium (arthritis), and erythrocytes (hemolysis) if it is not adequately controlled.

Cat. No. Product Name Effect Purity Chemical Structure
  • HY-B0579S1
    Cyclosporin A-d3
    Cyclosporin A-d3 is the d3-labeled Cyclosporin A (HY-B0579).
    Cyclosporin A-d<sub>3</sub>
  • HY-15701R
    Leukadherin-1 (Standard)
    		Agonist
    Leukadherin-1 (Standard) is the analytical standard of Leukadherin-1. This product is intended for research and analytical applications. Leukadherin-1, a specific agonist of the leukocyte surface integrin CD11b/CD18, increases CD11b/CD18-dependent cell adhesion to fibrinogen with an EC50 of 4 μM. Leukadherin-1 enhances leukocyte adhesion to ligands (such as ICAM-1) and vascular endothelium and thus reduces leukocyte transendothelial migration and influx to the injury sites. Leukadherin-1 suppresses innate inflammatory signaling.
    Leukadherin-1 (Standard)
  • HY-P990378
    Anti-Complement Factor P/Properdin Antibody
    		Inhibitor
    Anti-Complement Factor P/Properdin Antibody is a humanized antibody expressed in CHO, targeting Complement Factor P/Properdin. Anti-Complement Factor P/Properdin Antibody has a huIgG1 heavy chain and a huκ light chain, with a predicted molecular weight (MW) of 150 kDa. The isotype control for Anti-Complement Factor P/Properdin Antibody can be referenced as Human IgG1 kappa, Isotype Control (HY-P99001).
    Anti-Complement Factor P/Properdin Antibody
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Cat. No. Product Name / Synonyms Application Reactivity