rh-ApoAI (filled circles, solid line) and rh-apoAI 4WF (open circles, dashed line) were subjected to modification at varying HOCl: apoAI mole ratios. These proteins were then assayed for ABCA1 dependent cellular cholesterol acceptor activity. Data are means ± S.D. of triplicate determinations. **, p<0.0001 vs. rh-apoAI at the same HOCl:apoAI mole ratio, respectively, by two tailed t-test.