C1s

C1s
an enzyme that cleaves C4 into C4a and C4b and C2 into C2a and C2b, activated by cleavage of a peptide bond when C1 interacts with activators of the classical pathway; it is inhibited by C1 inhibitor. Called also C1 esterase. The activated state is sometimes specifically denoted by C1s.

Medical dictionary. 2011.

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  • C1 esterase — C1s; see under complement …   Medical dictionary

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