Textbook Question
Glycine has the zwitterion structure shown. Draw the structure and give the net charge of glycine that will predominate at the indicated pH values (pI = 6.0).
a. pH 1.5
Ch.10 Proteins Workers of the Cell
Frost4th EditionGeneral, Organic and Biological ChemistryISBN: 9780134988696
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Table of contents
- Ch.4 Introduction to Organic Compounds75
- Ch.5 Chemical Reactions19
- Ch.6 Carbohydrates Life's Sweet Molecules62
- Ch.7 States of Matter and Their Attractive Forces8
- Ch.8 Solution Chemistry Sugar and Water Do Mix4
- Ch.10 Proteins Workers of the Cell89
- Ch.11 Nucleic Acids Big Molecules with a Big Role69
- Ch.12 Food as Fuel An Overview of Metabolism65
Frost4th EditionGeneral, Organic and Biological ChemistryISBN: 9780134988696Not the one you use?Change textbook
Chapter 6, Problem 8c
Draw the structure for the amino acid represented by each of the following abbreviations:
c. Val
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Understand that 'Val' is the abbreviation for the amino acid Valine, which is one of the 20 standard amino acids.
Recall the general structure of an amino acid: it consists of a central carbon atom (the alpha carbon) bonded to four groups: an amino group (), a carboxyl group (), a hydrogen atom, and a unique side chain (R-group).
Identify the side chain (R-group) for Valine: it is an isopropyl group ().
Combine the components to draw the structure of Valine: the alpha carbon is at the center, bonded to the amino group, carboxyl group, hydrogen atom, and the isopropyl side chain.
Ensure the structure is drawn with proper connectivity and geometry, showing the tetrahedral arrangement around the alpha carbon and labeling the functional groups clearly.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Amino Acids
Amino acids are organic compounds that serve as the building blocks of proteins. Each amino acid consists of a central carbon atom, an amino group, a carboxyl group, a hydrogen atom, and a variable side chain (R group) that determines the specific properties of the amino acid. Understanding the structure of amino acids is essential for grasping how they link together to form proteins.
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3:03
Amino Acid Catabolism: Amino Group Example 2
Valine
Valine is one of the 20 standard amino acids and is classified as a branched-chain amino acid (BCAA). Its side chain is isopropyl, which gives it hydrophobic properties, making it important for protein structure and function. Valine plays a crucial role in muscle metabolism and is essential for tissue repair and energy production.
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Amino Acid Structure Representation
The structure of amino acids can be represented in various ways, including the Fischer projection and the ball-and-stick model. For valine, the structure includes the central carbon atom bonded to an amino group (–NH2), a carboxyl group (–COOH), a hydrogen atom, and its unique side chain. Accurately drawing these structures is vital for understanding biochemical interactions and protein synthesis.
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Related Practice
Textbook Question
Draw the structure for the amino acid represented by each of the following abbreviations:
c. Q
Textbook Question
Isoleucine has the zwitterion structure shown. Draw the structure and give the net charge of isoleucine that will predominate at the indicated pH values (pI = 6.0).
b. pH 6.0
Textbook Question
Draw the structure for the amino acid represented by each of the following abbreviations:
d. Ile
Textbook Question
Classify each amino acid in Problem 10.4 as polar (neutral, acidic, or basic) or nonpolar and as hydrophobic or hydrophilic.
a. leucine
b. glutamate
c. methionine
d. threonine
Textbook Question
Draw the structure for the amino acid represented by each of the following abbreviations:
d. Y