ABSTRACT
Theproteinsoftheclassicpathwayofcomplementactivationaredesignatedbyacapitalletter Cfollowedbyanumber;e.g.,C1,C4,C2,andsoforth.Theproteinsassociatedwiththe alternativepathwayofcomplementactivationaredesignatedbycapitalletters;e.g.,factorB, factorD,andso_forth.Theenzymaticallyactiveformsofthecomponentshaveabaroverthe symbol;e.g.,Cl.
