General description

Native, human C1 complement component. C1 is the first component of the classical complement pathway. It is a calcium-dependent complex of C1q, C1r, and C1s subcomponents which are present in the C1 complex at molar ratios of 1:2:2, respectively. Binding of C1 to classical pathway activators results in the conversion of the proenzyme C1s subcomponent to an active C1s enzyme. C1s enzyme cleaves both C4 and C2 resulting in formation of the C3 cleaving enzyme, C4b, C2a, of the classical complement pathway. C1 concentration is based on functional activity measurements relative to a normal serum standard pool.

Native, human C1 complement component. C1 is the first component of the classical complement pathway. It is a calcium dependent complex of C1q, C1r, and C1s subcomponents which are present in the C1 complex at molar ratios of 1:2:2 respectively. Binding of C1 to classical pathway activators results in the conversion of the proenzyme C1s subcomponent to an active C1s enzyme. C1s enzyme cleaves both C4 and C2, resulting in formation of the C3 cleaving enzyme, C4b, C2a, of the classical complement pathway. C1 concentration is based on functional activity measurements relative to a normal serum standard pool.

Legal Information

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

Other Notes

Cooper, N.R. 1985. Adv. Immunol. 37, 151.Ziccardi, R.J. and Cooper, N.R. 1977. J. Immunol. 118, 2047.

Packaging

200 µg in Plastic ampoule

Please refer to vial label for lot-specific concentration.

Physical form

In 300 mM NaCl, 50 mM sodium acetate, 50 mM EACA, 25 µM NPGB, 10 mM benzamidine, 10 mM EDTA, 40% glycerol, pH 5.5.

Warning

Toxicity: Standard Handling (A)