Variation of the molecular order parameter, Smol, at the segment C-2 in the fatty acyl chain of lipids as a function of the bound detergent/lipid ratio, rb, for C12-TAC (open squares) in POPC at 35°C (A), C6-gluc (solid circles) and C10-gluc (open circles) in DPPC at 45°C (taken from Meier and Seelig (30)) (B), and C8-malt (solid triangles), and C12-malt (open triangles) in POPC at 35°C (C). Solid lines represent the linear regressions.