C4 has an extinction coefficient of E1%/280 nM = 10.3. The buffer is PBS, pH 7.2.
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
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Qualitätsniveau
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
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.
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.
Hammer, C.H., et al. 1981. J. Biol. Chem. 256, 3995.
Rechtliche Hinweise
CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany
Lagerklassenschlüssel
12 - Non Combustible Liquids
WGK
WGK 2
Flammpunkt (°F)
Not applicable
Flammpunkt (°C)
Not applicable
Analysenzertifikate (COA)
Suchen Sie nach Analysenzertifikate (COA), indem Sie die Lot-/Chargennummer des Produkts eingeben. Lot- und Chargennummern sind auf dem Produktetikett hinter den Wörtern ‘Lot’ oder ‘Batch’ (Lot oder Charge) zu finden.
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Could you provide the spectrophotometric information for accurate concentration calculation using a Nanodrop after dialysis? I have previously been given the extinction coefficient of proteins at 1 mg/ml. Is this information available? Additionally, I am interested in knowing the original buffer in which this protein comes.
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