FUNCTION: C1s B chain is a serine protease that combines with C1q and C1r to form C1, the first component of the classical pathway of the complement system. C1r activates C1s so that it can, in turn, activate C2 and C4....
FUNCTION: C1s B chain is a serine protease that combines with C1q and C1r to form C1, the first component of the classical pathway of the complement system. C1r activates C1s so that it can, in turn, activate C2 and C4.
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GO - Biological processes (BP):
complement activation, classical pathway [GO:0006958]; innate immune response [GO:0045087]...
complement activation, classical pathway [GO:0006958]; innate immune response [GO:0045087]
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GO - Molecular function (MF):
calcium ion binding [GO:0005509]; identical protein binding [GO:0042802]; serine-type endopeptidase activity [GO:0004252]...
calcium ion binding [GO:0005509]; identical protein binding [GO:0042802]; serine-type endopeptidase activity [GO:0004252]
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GO - Cellular component (CC):
blood microparticle [GO:0072562]; complement component C1 complex [GO:0005602]; extracellular region [GO:0005576]; extracellular space [GO:0005615]...
blood microparticle [GO:0072562]; complement component C1 complex [GO:0005602]; extracellular region [GO:0005576]; extracellular space [GO:0005615]
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