The effect of BSA on the lysis time of single P falciparum–infected RBCs. Single infected RBCs were suspended in either serum-free RPMI or iso-osmotic sorbitol solutions in the absence and presence of 0.5% wt/vol BSA and/or 0.2 mM NPPB. Data points represent the inverse of lysis time from single experiments and for each condition the median inverse of lysis time point and 25th and 75th percentile points have been plotted.