Lemon-peel pectin

The pectin isolated from dried lemon-peel by extraction with cold water has been subjected to partial depolymerisation by acid hydrolysis, acetolysis, and enzymic degradation. Acidic oligosaccharides whose structures were established, or indicated by chromatographic identification of the products of methylation linkage-analysis, include 2- O -(α- D -galactopyranosyluronic acid)- L -rhamnose, higher oligosaccharides containing residues of galacturonic acid and rhamnose, 4- O -(α- D -galactopyranosyluronic acid)- D -galacturonic acid and the polymer-homologous trisaccharide, 6- O -(glucopyranosyluronic acid)galactose and 4- O -(glucopyranosyluronic acid)fucose, and 3- O -xylopyranosylgalacturonic acid.