Hormone-Phospholipid Interaction : a Possible Hormonal Mechanism of Action in the Control of Membrane Permeability

Abstract

Changes, proportional to the concentration of added gibberellic acid, in both width and location of the proton resonance peak of the nine equivalent protons of the terminal methyl groups of phosphatidy1 choline (lecithin), have allowed calculation of the dissociation constant of the lecithin-gibberellic acid complex in CDC1,. The existence of such a complex supports previous findings of an interaction of gibberellic acid with liposomes in aqueous media.