MeSH definition : Endogenous proteins that inhibit or inactivate COMPLEMENT C3B. They include COMPLEMENT
FACTOR H and COMPLEMENT FACTOR I (C3b/C4b inactivator). They cleave or promote the
cleavage of C3b into inactive fragments, and thus are important in the down-regulation
of COMPLEMENT ACTIVATION and its cytolytic sequence.;
Endogenous proteins that inhibit or inactivate COMPLEMENT C3B. They include COMPLEMENT
FACTOR H and COMPLEMENT FACTOR I (C3b/C4b inactivator). They cleave or promote the
cleavage of C3b into inactive fragments, and thus are important in the down-regulation
of COMPLEMENT ACTIVATION and its cytolytic sequence.