Fig. 6.3 Comparison of the structure of the betaine lipid, DGTS with phosphatidylcholine. DGTS = 1,2-diacylglyceryl-3-0-4'("N,N,N-trimethyl)-homoserine.
2) of the glycerol backbone. In mammals, there are almost exclusively ether linkages in the choline or ethanolamine glycerolipid class. If the ether link is unsaturated (Fig. 6.4) then the lipid is termed a plasmalogen. Indeed, of the ether-linked phos-phoglycerides, ethanolamine plasmalogen is the most widespread. It is especially abundant in nervous tissues and in white blood cells and platelets. The ether lipids are not confined to mammals but are also found in lower animals, some plants and many bacteria. Particular interest has recently been paid to the biologically active platelet activating factor (PAF) (Fig. 6.4) and its derivatives (see Section 7.1.10). PAF has a similar structure to the ether derivative of phosphatidylcholine (plasmanylcho-line) except that the fatty acid at the sn-2 position is replaced by an acetyl group.
Was this article helpful?
Tired of Trying To Loose Weight And It Never Works or You Have To Starve Yourself Well Here's A Weight Loss Plan That takes Care of Your Weight Problem And You Can Still Eat. In This Book, You’ll Learn How To Lose Weight And Not Feel Hungry! In An Easy Step-By-Step Process That Enables You To Feel Good About Loosing Weight As Well As Feeling Good Because Your Stomach Is Still Full.