[Lipids of free-living Penecurva sibirica turbellaria].

Lipids were extracted from the lyophylized free-living planariae P. sibirica according to the procedure of Folch et al. [14] and fractionated by means of thin-layer and column chromatography on the silicagel KSK. Total lipid content of planariae is equal to 28.70% of lyophylized weight, 21.70% of them being presented by phospholipids. Polar lipids include phosphatidylethanolamine, phosphatidylcholine, sphingomyelin, lysophosphatidylcholine and cerebrosides. Neutral lipids are presented by triglycerides, cholesterol cholesterol esters and free fatty acids. Saturated and unsaturated C6--C22 fatty acis were detected in the lipids.