Biochemistry: The Molecular Basis of Life
6th Edition
ISBN: 9780190209896
Author: Trudy McKee, James R. McKee
Publisher: Oxford University Press
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Chapter 6, Problem 68TQ
Summary Introduction
To review:
The activity of fumarate and malate in the citric acid cycle by Michaelis–Mentenconstant(Km) and turnover number (kcat), when
Introduction:
The binding affinity of the enzyme for the substrate is determined by
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Mixtures of amino acids can be analyzed by first separating the mixture into its components through ionexchange chromatography. Amino acids placed on a cation-exchange resin containing sulfonate ( -SO3-) groups flow down the column at different rates because of two factors that influence their movement: (1) ionic attraction between the sulfonate residues on the column and positively charged functional groups on the amino acids, and (2) aggregation of nonpolar amino acid side chains with the hydrophobic backbone of the polystyrene resin. For each pair of amino acids listed, determine which will be eluted first from the cation-exchange column by a pH 7.0 buffer. (a) Aspartate and lysine (b) Arginine and methionine(c) Glutamate and valine (d) Glycine and leucine (e) Serine and alanine
Consider a suspension of particles (isoelectric point is at pH 6) in water at pH 2 and a NaCl concentration of 0.001 M. Describe how the strength of repulsion varies with the following changes, assuming all other conditions remain constant. Give a description (more than just increase or decrease) in terms of the effect on the double layer thickness and the zeta potential. (a) Change from 0.001 M NaCl to 0.1 M NaCl, (b) Change from pH = 2 to pH = 5.
Mixtures of amino acids can be analyzed by first separating the mixture into its components through ion‑exchange chromatography.
Amino acids placed on a cation‑exchange resin containing sulfonate (−SO−3)(−SO3−) groups flow down the column at different rates because of two factors that influence their movement: (1) ionic attraction between the sulfonate residues on the column and positively charged functional groups on the amino acids, and (2) aggregation of nonpolar amino acid side chains with the hydrophobic backbone of the polystyrene resin.
Note that the ionic attraction is more important than hydrophobicity for this column media.
For each pair of amino acids, identify which will be eluted first from a cation‑exchange column using a pH 7.0pH 7.0 buffer.
Chapter 6 Solutions
Biochemistry: The Molecular Basis of Life
Ch. 6 - Prob. 1QCh. 6 - Prob. 2QCh. 6 - Prob. 3QCh. 6 - Prob. 4QCh. 6 - Prob. 5QCh. 6 - Prob. 6QCh. 6 - Prob. 7QCh. 6 - Prob. 8QCh. 6 - Prob. 9QCh. 6 - Prob. 1RQ
Ch. 6 - Prob. 2RQCh. 6 - Prob. 3RQCh. 6 - Prob. 4RQCh. 6 - Prob. 5RQCh. 6 - Prob. 6RQCh. 6 - Prob. 7RQCh. 6 - Prob. 8RQCh. 6 - Prob. 9RQCh. 6 - Prob. 10RQCh. 6 - Prob. 11RQCh. 6 - Prob. 12RQCh. 6 - Prob. 13RQCh. 6 - Prob. 14RQCh. 6 - Prob. 15RQCh. 6 - Prob. 16RQCh. 6 - Prob. 17RQCh. 6 - Prob. 18RQCh. 6 - Prob. 19RQCh. 6 - Prob. 20RQCh. 6 - Prob. 21RQCh. 6 - Prob. 22RQCh. 6 - Prob. 23RQCh. 6 - Prob. 24RQCh. 6 - Prob. 25RQCh. 6 - Prob. 26RQCh. 6 - Prob. 27RQCh. 6 - Prob. 28RQCh. 6 - Prob. 29RQCh. 6 - Prob. 30RQCh. 6 - Prob. 31RQCh. 6 - Prob. 32RQCh. 6 - Prob. 33RQCh. 6 - Prob. 34RQCh. 6 - Prob. 35RQCh. 6 - Prob. 36RQCh. 6 - Prob. 37RQCh. 6 - Prob. 38RQCh. 6 - Prob. 39RQCh. 6 - Prob. 40RQCh. 6 - Prob. 41RQCh. 6 - Prob. 42RQCh. 6 - Prob. 43FBCh. 6 - Prob. 44FBCh. 6 - Prob. 45FBCh. 6 - Prob. 46FBCh. 6 - Prob. 47FBCh. 6 - Prob. 48FBCh. 6 - Prob. 49FBCh. 6 - Prob. 50FBCh. 6 - Prob. 51FBCh. 6 - Prob. 52FBCh. 6 - Prob. 53SACh. 6 - Prob. 54SACh. 6 - Prob. 55SACh. 6 - Prob. 56SACh. 6 - Prob. 57SACh. 6 - Prob. 58TQCh. 6 - Prob. 59TQCh. 6 - Prob. 60TQCh. 6 - Prob. 61TQCh. 6 - Prob. 62TQCh. 6 - Prob. 63TQCh. 6 - Prob. 64TQCh. 6 - Prob. 65TQCh. 6 - Prob. 66TQCh. 6 - Prob. 67TQCh. 6 - Prob. 68TQCh. 6 - Prob. 69TQCh. 6 - Prob. 70TQCh. 6 - Prob. 71TQCh. 6 - Prob. 72TQCh. 6 - Prob. 73TQCh. 6 - Prob. 74TQCh. 6 - Prob. 75TQCh. 6 - Prob. 76TQCh. 6 - Prob. 77TQCh. 6 - Prob. 78TQCh. 6 - Prob. 79TQCh. 6 - Prob. 80TQCh. 6 - Prob. 81TQ
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