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Lysolecithin is prepared by the enzymatic hydrolysis
of lecithin using snake venom phospholipase A2.
The PA, PG, and PE, are prepared from the egg lecithin
by the action of phospholipase D in the presence of
the appropriate base.
Lysolecithin is a hygroscopic white powder that is not
susceptible to oxidation. The fatty acid composition is
mainly palmitic acid and stearic acid
(see Fatty Acid Content
of Tissue-Derived Lysophosphatides).
Fatty acid composition for all products (except lysolecithin)
is identical to Egg Phosphatidylcholine
(see
Fatty Acid Content Of Tissue-Derived Phosphatidylcholine).
**Transphosphatidylation:
enzymatic exchange of primary alcohols on phospholipid headgroups
(e.g., phospholipase D exchanges ethanolamine for choline
during the enzymatic conversion of PC to PE).
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