CH2 O I II HC-O-C —R I O I II H2C — O —C — R


Phosphoglycerides have fatty acids esterified at the 1 and 2 positions. A number of compounds may be esterified to the phosphate moiety, including choline, ethanolamine, serine, and myo-inositol. The compounds are called phosphatidylcholine, etc. These molecules are obviously amphipathic, having very polar constituents at the sn-3 position and acyl chains at the 1 and 2 positions. This attribute is very important to their function in biological membranes.

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