Ho

H OCH3 2,3-Di-O-methylglucose

(b) A 258 mg sample of amylopectin treated as described above yielded 12.4 mg of 2,3-di-O-methylglucose. Determine what percentage of the glucose residues in amy-lopectin contain an (a1n6) branch. (Assume that the average molecular weight of a glucose residue in amylopectin is 162 g/mol.)

17. Structural Analysis of a Polysaccharide A poly-saccharide of unknown structure was isolated, subjected to exhaustive methylation, and hydrolyzed. Analysis of the products revealed three methylated sugars in the ratio 20:1:1. The sugars were 2,3,4-tri-O-methyl-d-glucose; 2,4-di-O-methyl-d-glucose; and 2,3,4,6-tetra-O-methyl-d-glucose. What is the structure of the polysaccharide?

Essentials of Human Physiology

Essentials of Human Physiology

This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.

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