At the same time as C3b¯Bb¯3b is being formed, Factors I and H are acting to breakdown C3b to iC3b which, as mentioned above, forms an opsonin for [[Phagocytosis|phagocytosis]]. | At the same time as C3b¯Bb¯3b is being formed, Factors I and H are acting to breakdown C3b to iC3b which, as mentioned above, forms an opsonin for [[Phagocytosis|phagocytosis]]. |