The time course of DMPC turbidity clearance by the apoA-I forms or in buffer alone. DMPC multilamellar vesicles (40 μg/ml lipids) were preincubated at 24°C in the cuvette within the spectrophotometer, and the clearance was triggered by addition of lipid-free protein (final concentration in cuvette 16 μg/ml). *, WT apoA-I; Δ, apoA-I[K107A]; ○, apoA-I[K107del]; |, buffer alone.