The isolation and characterization of trigalactosyl diglyceride from potato tubers

Biochem J. 1969 Nov;115(2):335-9. doi: 10.1042/bj1150335.


Trigalactosyl diglyceride has been isolated from tubers of potato (Solanum tuberosum) by a combination of chromatographic methods. This galactolipid, which constitutes approximately 1% by weight of the total lipids, was characterized by analysis of the intact lipid and its deacylation product. The fatty acids:glycerol:galactose molar proportions were shown to be close to 2:1:3. Evidence was obtained that suggests that trigalactosyl diglyceride is a higher homologue of mono- and di-galactosyl diglycerides and contains an additional d-galactopyranosyl moiety that is linked alpha-(1-->6) to the terminal galactose unit of digalactosyl diglyceride.

MeSH terms

  • Chromatography
  • Fatty Acids / analysis
  • Galactose / analysis
  • Galactose / isolation & purification*
  • Glycerides / analysis
  • Glycerides / isolation & purification*
  • Glycerol / analysis
  • Plants, Edible / analysis*


  • Fatty Acids
  • Glycerides
  • Glycerol
  • Galactose