[Ferricyanide ion binding sites on the surface of lecithin liposomes]

Interaction of ferricyanide ions with sonicated lecithin liposomes has been studied by (1)H-NMR. Ferricyanide induced shifts have been shown to change along the choline chain of the lecithin head group. The magnitude of the shift decreases as the distance from the positive end of zwitterionic moiety increases. It is concluded that ferricyanide ions bind to the positive charged ammonium groups of the phospholipid.