Explanation The structure of zwitter ions changes as the pH of the solution changes. The pH at which the amino acids primarily exist as zwitter ion is known as the isoelectric point of that amino acid

7th Edition

ISBN: 9781305638686

Author: H. Stephen Stoker

Publisher: Brooks Cole

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Chapter 9, Problem 9.47EP

Interpretation Introduction

Interpretation: The term isoelectric point has to be explained.

Concept introduction: In the solid state and also in solution, α-amino acids exist as zwitterions. In the zwitter ion form of amino acids, the amino group is protonated and thus has a positive charge. However, the carboxyl group losses a proton and has a negative charge.

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Chapter 9, Problem 9.46EP

Chapter 9, Problem 9.48EP

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Solution Summary: The author explains the concept of the isoelectric point. The structure of zwitter ions changes as the pH of solution changes.

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