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Shown below is the titration curve for an amino acid. pH 14 12 10 H 8 4) 2 95 00 A C 05 B 1.0 1.5 E D 2.0 [OH ] (equivalents) G 2.5 F Which point represents the pKa of the R group? D 30 3.0 How many ionizable groups does this amino acid have? three DOV three ✓ What is the first point on this curve that 100% of the a-carboxyl group is completely deprotonated? C At ph=12, what is the protonation state and charge of the alpha-amino group of this amino acid? deprotonated no charge deprotonated no charge ✓

Shown below is the titration curve for an amino acid. pH 14 12 10 H 8 4) 2 95 00 A C 05 B 1.0 1.5 E D 2.0 [OH ] (equivalents) G 2.5 F Which point represents the pKa of the R group? D 30 3.0 How many ionizable groups does this amino acid have? three DOV three ✓ What is the first point on this curve that 100% of the a-carboxyl group is completely deprotonated? C At ph=12, what is the protonation state and charge of the alpha-amino group of this amino acid? deprotonated no charge deprotonated no charge ✓

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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Shown below is the titration curve for an amino acid. OH 14 12 10 8 6 4 2 OU 00 A с 05 B 1.0 1.5 E D 2.0 [OH ] (equivalents) G 2.5 F Which point represents the pKa of the R group? D 3.0 How many ionizable groups does this amino acid have? three v three VDV ✓ What is the first point on this curve that 100% of the a-carboxyl group is completely deprotonated? C VcV At ph=12, what is the protonation state and charge of the alpha-amino group of this amino acid? deprotonated no charge ✓deprotonated no charge
Transcribed Image Text:Shown below is the titration curve for an amino acid. OH 14 12 10 8 6 4 2 OU 00 A с 05 B 1.0 1.5 E D 2.0 [OH ] (equivalents) G 2.5 F Which point represents the pKa of the R group? D 3.0 How many ionizable groups does this amino acid have? three v three VDV ✓ What is the first point on this curve that 100% of the a-carboxyl group is completely deprotonated? C VcV At ph=12, what is the protonation state and charge of the alpha-amino group of this amino acid? deprotonated no charge ✓deprotonated no charge
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