Fig. 5. Scatter plots showing annexin-PE binding to O RBCs and effect of the terminal complement components C5b/6, C5-7, and C5-8. Compared to negative control (A) PS exposure of RBCs incubated with i.a. patient serum gradually increased in the presence of C6-depleted serum (B), C7-depleted serum (C), C8-depleted serum (D), and C9-depleted serum (E). Graph showing increase of PS exposure in the presence of sera depleted of complement component C6, C7, C8 and C9, respectively (F). (*) p<0.05, (**) p<0.01.