Biochemistry of the sphingolipides. X. Phytoglycolipide, a complex phytosphingosine‐containing lipide from plant seeds

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Summary: A new complex lipide, phytoglycolipide, has been isolated from soybea, corn, flaxseed, peanut, sunflowerseed, cottonseed, and wheat phosphatides. This material is obtained by a mild alkaline saponification procedure which destroys glycerol‐containing lipides. The new lipide constitutes about 5% of the crude phosphatides and is obtained as a white amorphous powder of identical composition, optical activity, and solubility properties from the various sources. Phytoglycolipide gives on hydrolysis phytosphingosine (and, in the case of soybean only, an unsaturated derivative of phytosphingosine) fatty acids, inositol, glucosamine, a hexuronic acid, galactose, arabinose, mannose, and phosphate.Phytoglycolipide is the first sphingolipide of plant origin to be described and is unique among complex sphingolipides in that it has the structural features of a glycolipide and of a phosphatide.

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