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Absorbance measurements of the solutions containing 0.20 mg/ml lecithin liposomes and Sudan II and IV and their linear regression. A: Sudan II in lecithin liposomes was dissolved in ethanol and the absorbance was measured at 495 nm; B: Sudan IV was dissolved in ethanol and the absorbance was measured at 515 nm; C: plots of γ-1 vs. CL-1 for the interaction of Sudan II with liposomes; D: as C, but using Sudan IV in place of Sudan II.
