A method for the selective release and, hence, assay of the carbohydrate moieties of collagen |
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Authors: | P W Tang J M Williams |
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Affiliation: | Chemistry Department, University College, Swansea SA2 8PP, Great Britain |
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Abstract: | The carbohydrate residues of collagen were selectively released in high yield by nitrosation of the hydroxylysines of the intact collagen or peptides derived from collagen. The carbohydrate residues (Glc-Gal and Gal) released were separated from the modified protein or peptide by gel chromatography and were assayed by gas-liquid chromatography of their trimethylsilyl derivatives. The results agreed closely with those obtained from methanolysis-gas chromatography or from alkaline hydrolysis followed by amino acid analysis of the hydroxylysyl glycosides. With a more sensitive perbenzoylation-high-performance liquid chromatography method and uv detection at 230 nm, the carbohydrates released by nitrosation of submilligram quantities of collagen or peptide could be assayed accurately. |
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Keywords: | collagen glycosylhydroxylysines nitrosation deamination carbohydrate (analysis) |
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