Domanda del libro di testo
What alkyl halide is used in the acetamidomalonic ester synthesis to prepare
b. phenylalanine?
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Ch. 21 - Amino Acids, Peptides, and Proteins
Bruice8th EditionOrganic ChemistryISBN: 9780135213711
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TOC.tableOfContents
- Ch. 1 - Remembering General Chemistry: Electronic Structure and Bonding31
- Ch. 2 - Acids and Bases: Central to Understanding Organic Chemistry84
- Ch. 3 - An Introduction to Organic Compounds: Nomenclature, Physical Properties, and Structure183
- Ch. 4 - Isomers: The Arrangement of Atoms in Space121
- Ch. 5 - Alkenes: Structure, Nomenclature, and an Introduction to Reactivity • Thermodynamics and Kinetics83
- Ch. 6 - The Reactions of Alkenes • The Stereochemistry of Addition Reactions175
- Ch. 7 - The Reactions of Alkynes • An Introduction to Multistep Synthesis119
- Ch. 8 - Delocalized Electrons: Their Effect on Stability, pKa, and the Products of a Reaction • Aromaticity and Electronic Effects: An Introduction to the Reactions of Benzene148
- Ch. 9 - Substitution and Elimination Reactions of Alkyl Halides212
- Ch. 10 - Reactions of Alcohols, Ethers, Epoxides, Amines, and Sulfur-Containing Compounds131
- Ch. 11 - Organometallic Compounds60
- Ch. 12 - Radicals90
- Ch. 13 - Mass Spectrometry; Infrared Spectroscopy; UV/Vis Spectroscopy62
- Ch. 14 - NMR Spectroscopy95
- Ch. 15 - Reactions of Carboxylic Acids and Carboxylic Acid Derivatives123
- Ch. 16 - Reactions of Aldehydes and Ketones • More Reactions of Carboxylic Acid Derivatives141
- Ch. 17 - Reactions at the Alpha-Carbon101
- Ch. 18 - Reactions of Benzene and Substituted Benzenes144
- Ch. 19 - More About Amines • Reactions of Heterocyclic Compounds49
- Ch. 20 - The Organic Chemistry of Carbohydrates80
- Ch. 21 - Amino Acids, Peptides, and Proteins57
- Ch. 22 - Catalysis in Organic Reactions and in Enzymatic Reactions35
- Ch. 23 - The Organic Chemistry of the Coenzymes—Compounds Derived from Vitamins1
- Ch. 28 - Pericyclic Reactions58
Capitolo 21, Problema 26
Draw the tetrapeptide Ala-Thr-Asp-Asn and indicate the peptide bonds.
Guida verificata passo dopo passo1
Step 1: Understand the structure of each amino acid. Alanine (Ala) has a methyl group (-CH₃) as its side chain, Threonine (Thr) has a hydroxyl group (-CH(OH)CH₃), Aspartic acid (Asp) has a carboxylic acid group (-CH₂COOH), and Asparagine (Asn) has an amide group (-CH₂CONH₂).
Step 2: Identify the general structure of an amino acid. Each amino acid has an amino group (-NH₂), a carboxyl group (-COOH), a hydrogen atom, and a unique side chain (R group) attached to the central carbon (α-carbon).
Step 3: Link the amino acids in the specified order (Ala-Thr-Asp-Asn) by forming peptide bonds. A peptide bond is formed between the carboxyl group (-COOH) of one amino acid and the amino group (-NH₂) of the next amino acid, releasing a molecule of water (H₂O) in a condensation reaction.
Step 4: Draw the tetrapeptide structure. Start with Alanine, connect its carboxyl group to the amino group of Threonine via a peptide bond, then connect Threonine's carboxyl group to the amino group of Aspartic acid, and finally connect Aspartic acid's carboxyl group to the amino group of Asparagine. Ensure the side chains of each amino acid are correctly represented.
Step 5: Indicate the peptide bonds in the structure. Highlight the C=O and N-H bonds that form the peptide linkages between each pair of amino acids. These bonds are the defining feature of the peptide backbone.
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Peptide Bonds
Peptide bonds are covalent bonds that link amino acids together in a protein or peptide chain. They form through a dehydration synthesis reaction, where the carboxyl group of one amino acid reacts with the amino group of another, releasing a molecule of water. This bond is crucial for the structure of proteins, as it determines the sequence and arrangement of amino acids.
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Percorso guidato
1:24
Peptides Example 1
Amino Acids
Amino acids are the building blocks of proteins, each consisting of a central carbon atom, an amino group, a carboxyl group, a hydrogen atom, and a variable side chain (R group). The side chain determines the properties of each amino acid, influencing the overall structure and function of the resulting peptide or protein. In the context of the question, the specific amino acids Ala (Alanine), Thr (Threonine), Asp (Aspartic acid), and Asn (Asparagine) are to be represented.
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09:36Standard Amino Acids
Tetrapeptide Structure
A tetrapeptide is a peptide composed of four amino acids linked by peptide bonds. The sequence of amino acids in a tetrapeptide is significant, as it dictates the peptide's properties and biological function. In this case, the tetrapeptide Ala-Thr-Asp-Asn must be drawn to show the correct order and connections, highlighting the peptide bonds between each pair of amino acids.
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03:04Drawing Resonance Structures
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