POPC is typically considered one of the model lipids for biophysical experiments. The fatty acid composition, i.e., saturated chain in the sn-1 position and unsaturated chain in the sn-2 position, mimics mammalian phospholipid composition. Since the major constituent in Egg PC is 1-palmitoyl-2-oleoyl PC, POPC is an excellent synthetic substitute for EPC.