2. Determine the branch points and reducing ends of amylopectin. A 0.5g sample of amylopectin was analyzed to determine the fraction of the total glucose residues that are branch points in the structure. The sample was methylated and then digested, yielding 50 umol Of 2,3-dimethylglucose and 0.4 umol of 1,2,3,6-tetramethyl glucose. (MW lucose = 162 g/mol, minus H,0) %3D a. What fraction of the total residues are branch points? b. How many reducing ends does the amylopectin have?

2. Determine the branch points and reducing ends of amylopectin. A 0.5g sample of amylopectin was analyzed to determine the fraction of the total glucose residues that are branch points in the structure. The sample was methylated and then digested, yielding 50 umol Of 2,3-dimethylglucose and 0.4 umol of 1,2,3,6-tetramethyl glucose. (MW lucose = 162 g/mol, minus H,0) %3D a. What fraction of the total residues are branch points? b. How many reducing ends does the amylopectin have?

Introduction to General, Organic and Biochemistry

11th Edition

ISBN:9781285869759

Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres

Publisher:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres

Chapter20: Carbohydrates

Section: Chapter Questions

Problem 20.86P

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Question

2. Determine the branch points and reducing ends of amylopectin.
A 0.5g sample of amylopectin was analyzed to determine the fraction of the
total glucose residues that are branch points in the structure. The sample was
methylated and then digested, yielding 50 umol of 2,3-dimethylglucose and 0.4 µmol
of 1,2,3,6-tetramethyl glucose. (MWglucose = 162 g/mol, minus H,0)
%3D
a. What fraction of the total residues are branch points?
b. How many reducing ends does the amylopectin have?

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