FIGURE 1. Dosedependent effect of sPLA 2 on hemolysis of PSexposing and intact human erythrocytes. Normal and PSexposing red blood cells were incubated with concentrations of sPLA 2 ranging from 0–500 ng/ml for 1 h at 37° C. Hemolysis was measured by the amount of cellfree hemoglobin in the cell lysates compared with an equal volume of hypotonically lysed RBC.