FIG. 6.

Effect of phospholipid composition on H and DAF regulation of ACP C3 convertase activity. PC and PE liposomes were prepared as for Fig. 1. (A) Liposomes with equal amounts of bound C3b were tested for inhibition of C3 convertase activity by DAF as described for Fig. 3. (B) Liposomes with equal amounts of bound C3b were tested for inhibition of C3 convertase activity by H as described for Fig. 4. Data presented are the means ± SEM of two or more experiments using triplicate samples.