What am I missing here? Improve this question. Add a comment. Active Oldest Votes. Those derived from sphingosine - sphingomyelin. Phosphoglycerides are indeed a type of phospholipid. Improve this answer. Bob Bob 4 4 silver badges 12 12 bronze badges.
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In addition, there is usually a complex amino alcohol also attached to the phosphate through a second phosphate ester bond. The complex amino alcohols include choline, ethanolamine, and the amino acid-serine. The long hydrocarbon chains of the fatty acids are of course non-polar. The phosphate group has a negatively charged oxygen and a positively charged nitrogen to make this group ionic.
In addition there are other oxygen of the ester groups, which make on whole end of the molecule strongly ionic and polar. Phospholipids are major components in the lipid bilayers of cell membranes.
There are two common phospholipids:. Lecithin is probably the most common phospholipid. It is found in egg yolks, wheat germ, and soybeans. Lecithin is extracted from soy beans for use as an emulsifying agent in foods.
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