204863

Complement iC3b, Human

Complement iC3b, Human, is a native form that is formed by the cleavage of C3b by Factor I in the presence of Factor H, CR1, or membrane cofactor protein.

• Synonym(s): Complement iC3b, Human Complement iC3b, Human iC3b
• UNSPSC Code: 12352202
• NACRES: NA.25

Properties

• Quality Level: 100
• Assay: ≥90% (SDS-PAGE)
• form: liquid
• does not contain: preservative
• manufacturer/tradename: Calbiochem^®
• storage condition: OK to freeze; avoid repeated freeze/thaw cycles
• impurities: IgG, IgA, IgM, C5, Factor H, or Factor I, trace
• shipped in: wet ice
• storage temp.: −70°C

Description

General description

Native, human iC3b complement component. iC3b is formed by the cleavage of C3b by Factor I in the presence of Factor H, CR1, or membrane cofactor protein. Factor I cleavage of C3b to iC3b inactivates and prevents C3b from functioning in the C3 or C5 convertase enzymes. The iC3b fragment thus produced is a glycoprotein composed of two C3α′ polypeptides of M.W. 43 kDa and M.W. 63 kDa which are disulfide bonded to the intact C3 β-chain (M.W. 75 kDa). iC3b interaction with CR3 (CD11b/CD18) receptors present on a variety of white blood cells greatly enhances phagocytosis of iC3b coated target cells or particles.

Packaging

Please refer to vial label for lot-specific concentration.

Warning

Toxicity: Standard Handling (A)

Other Notes

Rosen, H. and Law, S.K.A. 1989. Curr. Top. Microbiol. Immunol.153, 99.
Ross, G.S. and Medof, M.E. 1985. Adv. Immunol.37, 217.

Legal Information

CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany

Safety Information

• Storage Class Code: 10 - Combustible liquids
• WGK: WGK 1
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable