C3 -> C3b
C3b + Factor_B <-> C3bB_closed
C3bB_closed <-> C3bB_open
C3bB_open -> C3bBb
C3bBb + Factor_H <-> C3bBbH
C3bBbH -> Bb + C3b + Factor_H
C3bBb -> Bb + C3b
C3b + Factor_H <-> C3bH
C3bH -> Factor_H + iC3b
0 -> C3
C3 -> 0
0 -> Factor_B
Factor_B -> 0
0 -> Factor_H
Factor_H -> 0