A practical guide to structural analysis of carbohydrates

Occurrence of glycosyl residues in glycans of different origin

Percentage of structures of different origin in the CCSD that contain these glycosyl residues. Although the numbers are highly dependent on the selection of structures in the data base they do give a general idea of what to expect when analysing glucans of different origin.
E.g. compounds of mammalian origin often contain L-Fucp but no L-Rhap and rarely pentoses or uronic acids. Even among bacterial polysaccharides there is a marked difference, e.g. in the frequency of D-GlcAp residues in LPS and CPS.
Human Rat Yeast Bacterial LPS Bacterial CPS Plant saponins
D-Glcp 20% 44% 16% 33% 62% 80%
D-Galp 87% 80% 1% 31% 51% 28%
D-Manp 42% 34% 95% 11% 21% -
L-Fucp 41% 39% - 3% 3% 1%
L-Rhap - - - 24% 33% 49%
D-GlcAp 1% 2% - 3% 40% 20%
D-GalAp - - - 3% 4% -
D-GlcpNAc 76% 56% 28% 30% 15% -
D-GalpNAc 14% 29% 1% 12% 8% -
L-Arap - - - - - 17%
D-Xylp - - - 2% 1% 25%