well what are your strengths and what are you good at.
1) C1 interacts with and antibody that is bound to pathogen
2)C1 cleaves C2 and C4
3)C2a and C4b combine to form an enzyme
4)C3 is split into C3a and C3b
Classical pathway is activated by antigen antibody complex indicating the proteolytic cleavage of the molecule. C1 is activated by this complex and the activated C1 acts on C2 AND C4 to for an enzyme C3 convertase (C4b,2b).This enzyme then acts on C3 and causes it to cleave into C3 and C3b.