0 votes 0 votes Which one of the following complement proteins is the initiator of the membrane attack complex $C3a$ $C3b$ $C5a$ $C5b$ Others gate2015 + – Milicevic3306 asked Mar 26, 2018 edited Nov 27, 2020 by go_editor Milicevic3306 7.9k points answer comment Share Follow See all 0 reply Please log in or register to add a comment.