Introduction - This script shows the effects of one or more cis double bonds on the structure of fatty acids. Note how multiple double bonds introduce kinks into the hydrocarbon chain, which will prevent close packing of phospholipids containing such fatty acids. Scroll down until the text corresponding to the view is visible. (Based on structure files from Klotho).
This is stearic acid, which contains no double bonds.
This is oleic acid, which contains one double bond.
This is linoleic acid, which contains two double bonds.
This is linolenic acid, which contains three double bonds.
This is arachidonic acid, which contains four double bonds.