Peptido-oligosaccharides

This variation in results is, in part, a reflection of the variation in the methods that have been used for isolating urinary glycopeptides and peptido-oligosaccharides, and, from this, it would appear that there is, as yet, no generally accepted, methodical sequence for this... 

A characteristic but unexplained feature of the peptide composition of all of these glycopeptides and peptido-oligosaccharides (see Table V) is the absence, or presence in traces only, of the aromatic amino acids. The presence of hydroxy-L-proline in some of these fractions might indicate that the glycopeptide components of these fractions are derived from connective-tissue components, as this... 

Carbohydrate and Peptide Composition of Urinary Glycopeptides and Peptido-oligosaccharides... 

Amino acids identified by paper or column chromatography after acid hydrolysis of the glycopeptide or peptido-oligosaccharide fractions. Amino acids present in trace quantities are shown in italics. 

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