ORGANIC CHEMISTRY (LL) W/ACCESS
ORGANIC CHEMISTRY (LL) W/ACCESS
4th Edition
ISBN: 9781119856122
Author: Klein
Publisher: WILEY
Question
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Chapter 25, Problem 49PP

(a)

Interpretation Introduction

Interpretation:

The pI value for the given set of amino acids needs to be calculated.

Concept introduction:

Amino acids at a particular pH do not migrate in an electric field.  This pH is known as the isoelectric point.  The isoelectric point is also known as isoionic point.  At this isoelectric point the amino acid is neutral.  This means that the zwitterion form predominates more over the other forms.  pI is the isoelectric point and this can be given by average of the pKa.

pI=pKa1+pKa22

To find : To find the pI value of L-alanine

(b)

Interpretation Introduction

Interpretation:

The pI value for the given set of amino acids needs to be calculated.

Concept introduction:

Amino acids at a particular pH do not migrate in an electric field.  This pH is known as the isoelectric point.  The isoelectric point is also known as isoionic point.  At this isoelectric point the amino acid is neutral.  This means that the zwitterion form predominates more over the other forms.  pI is the isoelectric point and this can be given by average of the pKa.

pI=pKa1+pKa22

To find : To find the pI value of L-asparagine

(c)

Interpretation Introduction

Interpretation:

The pI value for the given set of amino acids needs to be calculated.

Concept introduction:

Amino acids at a particular pH do not migrate in an electric field.  This pH is known as the isoelectric point.  The isoelectric point is also known as isoionic point.  At this isoelectric point the amino acid is neutral.  This means that the zwitterion form predominates more over the other forms.  pI is the isoelectric point and this can be given by average of the pKa.

pI=pKa1+pKa22

To find : To find the pI value of L-histidine

(d)

Interpretation Introduction

Interpretation:

The pI value for the given set of amino acids needs to be calculated.

Concept introduction:

Amino acids at a particular pH do not migrate in an electric field.  This pH is known as the isoelectric point.  The isoelectric point is also known as isoionic point.  At this isoelectric point the amino acid is neutral.  This means that the zwitterion form predominates more over the other forms.  pI is the isoelectric point and this can be given by average of the pKa.

pI=pKa1+pKa22

To find : To find the pI value of L-glutamic  acid

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Chapter 25 Solutions

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