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(Left, Ourisson and Nakatani 1994) Very simple model of eucaryotic membranes. Membranes separate ‘inside’ from ‘outside’. Eucaryotic membranes usually consist of a bilayer of di-acyl phospholipids and sterols like cholesterol. Amphipathic proteins are also present in the bilayer. (Right) Topography of cholesterol in lipid bilayers
