A double-layer of amphipathic lipid molecule
s arranged with their nonpolar hydrocarbon
tails facing inward. These bilayers can spontaneously form under certain conditions; the plasma membrane
s of animal
cells are formed mainly from phospholipid
-containing lipids) bilayers.
From the BioTech Dictionary at http://biotech.icmb.utexas.edu/. For further information see the BioTech homenode.