¹⁴C PC has no effect on C5b-7 uptake and lysis by C5b-9. DPPC was incorporated into the erythrocytes as in Fig3; however, we used ¹⁴C-DPPC as a marker of DPPC incorporation. The cells were washed and used in a hemolytic assay to determine percent lysis (○). The same cells were used to measure uptake of C5b-7 using ¹²⁵I-C7 (•). Lysis before the addition of C8 and C9 varied between 0% for the buffer control and 5% for the highest concentration of DPPC.