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204863

Sigma-Aldrich

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

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About This Item

UNSPSC Code:
12352202
NACRES:
NA.25

Quality Level

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

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 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. 43,000 and M.W. 63,000 are disulfide bonded to the intact C3 b-chain (M.W. 75,000). 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.
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

wgk_germany

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable


Certificates of Analysis (COA)

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