nitial r of the classical ent path W9wg999W9ggW99￥￥yygW9W99g99 C4b Ca C3b C3h Mg C2b C3a Opsonizing activity ct 80.00 3 C1 esterase c2 115,000 C1s -Enzymatic phase- erminal reactions of the classical complement pathwa MAC 8163.68079.000Mw -Enzymatic phase十 Attack phase-