204886

Complement C4, Human

Complement C4, Human, CAS 80295-48-3,is a native glycoprotein composed of three non-identical subunits of 93, 75, and 32 kDa linked by disulfide bonds.

• Synonym(e): Complement C4, Human
• CAS-Nummer: 80295-48-3
• MDL-Nummer: MFCD00130838
• UNSPSC-Code: 12352202
• NACRES: NA.25

Eigenschaften

• Qualitätsniveau: 100
• Assay: ≥90% (SDS-PAGE)
• Form: liquid
• Spezifische Aktivität: >3X10⁵ C4H50 units/mg protein
• Hersteller/Markenname: Calbiochem^®
• Lagerbedingungen: OK to freeze; avoid repeated freeze/thaw cycles
• Versandbedingung: dry ice
• Lagertemp.: −70°C

Beschreibung

Allgemeine Beschreibung

Native, human C4 complement component. Glycoprotein composed of three non-identical subunits of M.W. 93,000 (α), 75,000 (β), and 32,000 (γ) linked by disulfide bonds. Present in normal human serum at 400 µg/ml. On activation of complement via the classical pathway, the C1s subcomponent of the C1 complex is converted to an active serine protease that cleaves the C4 α-chain at peptide bond 77, resulting in the production of C4a (M.W. 8740) and C4b fragments (M.W. 193,000). The released C4a peptide is one of the three complement-derived anaphylatoxins. The nascent C4b fragment can form a covalent ester bond with target surfaces. This covalent attachment of C4b to target acceptors is required for continuation of activation via classical pathway.

Native, human C4 complement component. Glycoprotein composed of three non-identical subunits of M.W. of 93 kDa (α), 75 kDa (β), and 32 kDa (γ) linked by disulfide bonds. Present in normal human serum at 400 µg/ml. On activation of complement via the classical pathway, the C1s subcomponent of the C1 complex is converted to an active serine protease that cleaves the C4 α-chain at peptide bond 77, resulting in production of C4a (M.W. 8740) and C4b fragments (M.W. 193 kDa). The released C4a peptide is one of the three complement-derived anaphylatoxins. The nascent C4b fragment can form a covalent ester bond with target surfaces. This covalent attachment of C4b to target acceptors is required for continuation of activation via classical pathway.

Biochem./physiol. Wirkung

≥60% of the C4 activity present in freshly drawn normal human serum on a mg to mg basis

Verpackung

Please refer to vial label for lot-specific concentration.

Warnhinweis

Toxicity: Standard Handling (A)

Sonstige Hinweise

Janatova, J. 1983. Ann. N.Y. Acad. Sci. 421, 218.
Hammer, C.H., et al. 1981. J. Biol. Chem. 256, 3995.

Rechtliche Hinweise

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

Sicherheitshinweise

• Lagerklassenschlüssel: 12 - Non Combustible Liquids
• WGK: WGK 2
• Flammpunkt (°F): Not applicable
• Flammpunkt (°C): Not applicable