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Polygalactolipids in Spinach Chloroplast ¹

^a Department of Chemistry, Western Washington State College, Bellingham, Washington 98225

Two polygalactolipids, designated as components A and B, were isolated from spinach chloroplasts and were also obtained from glycolipid products synthesized with chloroplast enzymes using uridine diphosphate galactose as a galactose donor. These lipids were purified by column and thin layer chromatography. Chemical analysis of component A indicates that the lipid is trigalactosyl diglyceride, whereas component B behaves like tetragalactosyl diglyceride on a thin layer plate. The major fatty acid in trigalactosyl diglyceride was -linolenic acid. Relative amount (molar ratio) of galactolipids in spinach chloroplasts was monogalactosyl diglyceride:digalactosyl diglyceride:trigalactosyl diglyceride:(tetragalactosyl diglyceride) = 60:30:5:1.

¹ This work was supported by a grant from NSF (GB-4574).

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				R. Douce Site of Biosynthesis of Galactolipids in Spinach Chloroplasts Science, March 1, 1974; 183(4127): 852 - 853. [Abstract] [PDF]