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13.4) In the previous problem, you drew the predominant form of leucine at pH= 1.0, pH = 7.4, and pH = 12.0. These structures are shown below. What is the total charge of leucine at pH = 1.0, pH = 7.4, and pH = 12.0? H pH = 1.0 H H H-Nc−c-0–H :0: CH₂ CHCH3 CH3 total charge = 1+ There is a formal charge of 1+ on the nitrogen. physiological pH (pH = 7.4) H H :0: | H-N CICIO: H CH₂ CHCH3 CH3 total charge=0 There is a formal charge of 1+ on the nitrogen, and a formal charge of 1- on the oxygen. Adding these charges give a total charge = 0. H- pH = 12.0 H :0: || C-C H CH₂ CHCH3 CH3 total charge = 1- There is a formal charge of 1- on the oxygen.

13.4) In the previous problem, you drew the predominant form of leucine at pH= 1.0, pH = 7.4, and pH = 12.0. These structures are shown below. What is the total charge of leucine at pH = 1.0, pH = 7.4, and pH = 12.0? H pH = 1.0 H H H-Nc−c-0–H :0: CH₂ CHCH3 CH3 total charge = 1+ There is a formal charge of 1+ on the nitrogen. physiological pH (pH = 7.4) H H :0: | H-N CICIO: H CH₂ CHCH3 CH3 total charge=0 There is a formal charge of 1+ on the nitrogen, and a formal charge of 1- on the oxygen. Adding these charges give a total charge = 0. H- pH = 12.0 H :0: || C-C H CH₂ CHCH3 CH3 total charge = 1- There is a formal charge of 1- on the oxygen.

Biochemistry
Biochemistry
9th Edition
ISBN:9781319114671
Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.
Chapter1: Biochemistry: An Evolving Science
Section: Chapter Questions
Problem 1P
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13.4) In the previous problem, you drew the predominant form of leucine at pH = 1.0, pH = 7.4, and pH = 12.0. These structures are shown below. What is the total charge of leucine at pH = 1.0, pH = 7.4, and pH = 12.0? H H-N H pH = 1.0 H :0: I || с CH₂ | CHCH3 -Ö-H CH3 total charge = 1+ There is a formal charge of 1+ on the nitrogen. physiological pH (pH = 7.4) H H :0: 1 || -C-0: H- | H CH₂ | CHCH3 | CH3 total charge = 0 There is a formal charge of 1+ on the nitrogen, and a formal charge of 1- on the oxygen. Adding these charges give a total charge = 0. pH = 12.0 H | H-N- :0: || H CH₂ | CHCH3 T CH3 total charge = 1- There is a formal charge of 1- on the oxygen.
Transcribed Image Text:13.4) In the previous problem, you drew the predominant form of leucine at pH = 1.0, pH = 7.4, and pH = 12.0. These structures are shown below. What is the total charge of leucine at pH = 1.0, pH = 7.4, and pH = 12.0? H H-N H pH = 1.0 H :0: I || с CH₂ | CHCH3 -Ö-H CH3 total charge = 1+ There is a formal charge of 1+ on the nitrogen. physiological pH (pH = 7.4) H H :0: 1 || -C-0: H- | H CH₂ | CHCH3 | CH3 total charge = 0 There is a formal charge of 1+ on the nitrogen, and a formal charge of 1- on the oxygen. Adding these charges give a total charge = 0. pH = 12.0 H | H-N- :0: || H CH₂ | CHCH3 T CH3 total charge = 1- There is a formal charge of 1- on the oxygen.
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