Reason for the carboxylic group of the amino acid is more acidic than a carboxylic acid of acetic acid has to be given. Concept Introduction: Acid-base properties of Amino acids: Every amino acid has a carbonyl group and an amino group, and each group can exist in an acidic form or a basic form, depending on pH of the solution in which the amino acid is dissolved. The compound exists primarily in the acidic form in solutions that are more acidic than their pK a values, and primarily in the basic form (without their protons) in solutions that are more basic than their pK a values.

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Definition Definition Class of organic compounds that contain a carboxyl group ( - COOH ) and has a general formula R - COOH or R - CO 2 H , where R refers to the alkyl, alkenyl, aryl, or other groups. They can undergo different chemical reactions, such as acid-base reactions, esterification, and oxidation. These are essential components of living organisms, playing important roles in metabolic processes, signaling, and as pharmaceuticals.

Chapter 17.3, Problem 4P

Interpretation Introduction

Interpretation:

Reason for the carboxylic group of the amino acid is more acidic than a carboxylic acid of acetic acid has to be given.

Concept Introduction:

Acid-base properties of Amino acids:

Every amino acid has a carbonyl group and an amino group, and each group can exist in an acidic form or a basic form, depending on pH of the solution in which the amino acid is dissolved.

The compound exists primarily in the acidic form in solutions that are more acidic than their pKa values, and primarily in the basic form (without their protons) in solutions that are more basic than their pKa values.

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In 0.1M solution glycine (pKa 9.6) at pH of 9.0, what fraction of glycine has its amino group in the -NH3+ form?

Net Charge on an Amino Group.The amino acid glycine has hydrogen as its side-chain (R) group. Values of pKca= 2:36 and pKaa=9:56 have been previously reported for glycine. Superscripts c, a, and s refer to a-carboxylic acid, α-amino base, and side chain, respectively. Using these values, determine the net charge on the a-amino group of glycine at a physiologic pH of 7.2 and a pH of 3 [70].

4a) Canavanine is an amino acid that is produced by some legume plants. It is not used in proteins but serves as a nitrogen storage molecule in seeds, and is being investigated as a possible anti-cancer and anti-viral drug. Canavanine's amino and carboxyl groups are the same as those in any other amino acid (pKa for the amino group is 8.0 and pKa for the carboxyl group is 3.1), and its side group has a single ionizable group with a pKa of 7.0. Describe or explain what that statement (the previous sentence) tells you about the protonation state of each of the 3 ionizable groups on this amino acid if it is dissolved in pure distilled water at pH 7.0.

Answer 2

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Definition Definition Class of organic compounds that contain a carboxyl group ( - COOH ) and has a general formula R - COOH or R - CO 2 H , where R refers to the alkyl, alkenyl, aryl, or other groups. They can undergo different chemical reactions, such as acid-base reactions, esterification, and oxidation. These are essential components of living organisms, playing important roles in metabolic processes, signaling, and as pharmaceuticals.

Chapter 17.3, Problem 4P

Interpretation Introduction

Interpretation:

Reason for the carboxylic group of the amino acid is more acidic than a carboxylic acid of acetic acid has to be given.

Concept Introduction:

Acid-base properties of Amino acids:

Every amino acid has a carbonyl group and an amino group, and each group can exist in an acidic form or a basic form, depending on pH of the solution in which the amino acid is dissolved.

The compound exists primarily in the acidic form in solutions that are more acidic than their pKa values, and primarily in the basic form (without their protons) in solutions that are more basic than their pKa values.

Expert Solution & Answer

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Answer 3

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Definition Definition Class of organic compounds that contain a carboxyl group ( - COOH ) and has a general formula R - COOH or R - CO 2 H , where R refers to the alkyl, alkenyl, aryl, or other groups. They can undergo different chemical reactions, such as acid-base reactions, esterification, and oxidation. These are essential components of living organisms, playing important roles in metabolic processes, signaling, and as pharmaceuticals.

Chapter 17.3, Problem 4P

Interpretation Introduction

Interpretation:

Reason for the carboxylic group of the amino acid is more acidic than a carboxylic acid of acetic acid has to be given.

Concept Introduction:

Acid-base properties of Amino acids:

Every amino acid has a carbonyl group and an amino group, and each group can exist in an acidic form or a basic form, depending on pH of the solution in which the amino acid is dissolved.

The compound exists primarily in the acidic form in solutions that are more acidic than their pKa values, and primarily in the basic form (without their protons) in solutions that are more basic than their pKa values.

Expert Solution & Answer

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Check out a sample textbook solution

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Answer 4

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Definition Definition Class of organic compounds that contain a carboxyl group ( - COOH ) and has a general formula R - COOH or R - CO 2 H , where R refers to the alkyl, alkenyl, aryl, or other groups. They can undergo different chemical reactions, such as acid-base reactions, esterification, and oxidation. These are essential components of living organisms, playing important roles in metabolic processes, signaling, and as pharmaceuticals.

Chapter 17.3, Problem 4P

Interpretation Introduction