Uncertainties in the use of periodate oxidation for determination of dextran structure.
A glucan of high molecular weight isolated from stale sugar-cane, and previously shown to have a marked effect on sucrose crystallisation processes-1, is a relatively linear dextran. Approximately 96-97% of its D-glucose residues are involved in (1 yields 6)-alpha-D linkages and constitute the linear backbone of the polymer. The remaining 3-4% of D-glucose residues form branch-points by (1 yields 3)-alpha-D linkages. The periodate-oxidation technique, which has been extensively used by other workers to determine dextran structure, gave erroneous results when applied to the dextran from stale sugar-cane.
D002850:Chromatography, Gel; D002854:Chromatography, Paper; D003911:Dextrans; D005069:Evaluation Studies as Topic; D007700:Kinetics; D008722:Methods; D008757:Methylglucosides / Q000032:analysis; D008970:Molecular Weight; D010084:Oxidation-Reduction; D010504:Periodic Acid; D010944:Plants / Q000032:analysis; D013997:Time Factors
D003911:Dextrans; D008757:Methylglucosides; D010504:Periodic Acid