Organic Chemistry - With Access (Looseleaf) (Custom)
4th Edition
ISBN: 9781259726224
Author: SMITH
Publisher: MCG
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Chapter 29, Problem 29.61P
Interpretation Introduction
Interpretation: The sequence of an octapeptide that contains amino acids is to be deduced by using the experimental data.
Concept introduction: Peptide linkage is formed between the amino group of one amino acid and the carboxyl group of other amino acid with the loss of water molecule. Amino acids are naturally occurring compounds in which the amino group is present on the alpha carbon of carboxyl group. The name of amino acids is represented by the one-letter and three-letter abbreviations. Edman degradation is used to identify the N-terminal amino acids.
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Deduce the sequence of a pentapeptide that contains the amino acids Ala, Glu, Gly, Ser, and Tyr, from the following experimental data. Edman degradation cleaves Gly from the pentapeptide, and carboxypeptidase forms Ala and a tetrapeptide. Treatment of the pentapeptide with chymotrypsin forms a dipeptide and a tripeptide. Partial hydrolysis forms Gly, Ser, and the tripeptide Tyr–Glu–Ala.
Deduce the sequence of a heptapeptide that contains the amino acids Ala, Arg, Glu, Gly, Leu, Phe, and Ser, from the following experimental data. Edman degradation cleaves Leu from the heptapeptide, and carboxypeptidase forms Glu and a hexapeptide. Treatment of the heptapeptide with chymotrypsin forms a hexapeptide and a single amino acid. Treatment of the heptapeptide with trypsin forms a pentapeptide and a dipeptide. Partial hydrolysis forms Glu, Leu, Phe, and the tripeptides Gly–Ala–Ser and Ala–Ser–Arg.
Determine the amino acid sequence of a polypeptide from the following data:Acid-catalyzed hydrolysis gives Ala, Arg, His, 2 Lys, Leu, 2 Met, Pro, 2 Ser, Thr, and Val.Carboxypeptidase A releases Val.Edman’s reagent releases PTH-Leu.Treatment with cyanogen bromide gives three peptides with the following amino acid compositions:1. His, Lys, Met, Pro, Ser 2. Thr, Val 3. Ala, Arg, Leu, Lys, Met, Ser
Chapter 29 Solutions
Organic Chemistry - With Access (Looseleaf) (Custom)
Ch. 29 - Prob. 29.1PCh. 29 - Problem 29.2
What form exists at the isoelectric...Ch. 29 - Problem 29.3
Explain why the of the group of an...Ch. 29 - Problem 29.5
What -halo carbonyl compound is...Ch. 29 - Problem 29.6
The enolate derived from diethyl...Ch. 29 - Problem 29.7
What amino acid is formed when is...Ch. 29 - Problem 29.8
What aldehyde is needed to synthesize...Ch. 29 - Prob. 29.8PCh. 29 - Prob. 29.9PCh. 29 - Prob. 29.10P
Ch. 29 - Prob. 29.11PCh. 29 - Problem 29.13
What alkene is needed to synthesize...Ch. 29 - Problem 29.14
Draw the structure of each peptide....Ch. 29 - Name each peptide using both the one-letter and...Ch. 29 - Prob. 29.15PCh. 29 - Prob. 29.16PCh. 29 - Problem 29.18
Glutathione, a powerful antioxidant...Ch. 29 - Problem 29.19
Draw the structure of the...Ch. 29 - Problem 29.20
Give the amino acid sequence of an...Ch. 29 - a What products are formed when each peptide is...Ch. 29 - Prob. 29.21PCh. 29 - Devise a synthesis of each peptide from amino acid...Ch. 29 - Devise a synthesis of the following dipeptide from...Ch. 29 - Prob. 29.24PCh. 29 - Consider two molecules of a tetrapeptide composed...Ch. 29 - What types of stabilizing interactions exist...Ch. 29 - Prob. 29.27PCh. 29 - Draw the product formed when the following amino...Ch. 29 - With reference to the following peptide: a...Ch. 29 - Devise a synthesis of the following dipeptide from...Ch. 29 - Prob. 29.31PCh. 29 - Prob. 29.32PCh. 29 - Histidine is classified as a basic amino acid...Ch. 29 - Tryptophan is not classified as a basic amino acid...Ch. 29 - What is the structure of each amino acid at its...Ch. 29 - To calculate the isoelectric point of amino acids...Ch. 29 - What is the predominant form of each of the...Ch. 29 - 29.37 What is the predominant form of each of the...Ch. 29 - a. Draw the structure of the tripeptide A–A–A, and...Ch. 29 - Draw the organic product formed when the amino...Ch. 29 - 29.39 Draw the organic products formed in each...Ch. 29 - 29.40 What alkyl halide is needed to synthesize...Ch. 29 - 29.41 Devise a synthesis of threonine from diethyl...Ch. 29 - 29.42 Devise a synthesis of each amino acid from...Ch. 29 - Prob. 29.45PCh. 29 - Prob. 29.46PCh. 29 - Prob. 29.47PCh. 29 - Prob. 29.48PCh. 29 - Prob. 29.49PCh. 29 - 29.48 Brucine is a poisonous alkaloid obtained...Ch. 29 - Prob. 29.51PCh. 29 - Prob. 29.52PCh. 29 - Draw the structure for each peptide: (a) Phe–Ala;...Ch. 29 - 29.52 For the tetrapeptide Asp–Arg–Val–Tyr:
a....Ch. 29 - Prob. 29.55PCh. 29 - Explain why a peptide CN bond is stronger than an...Ch. 29 - Prob. 29.57PCh. 29 - 29.55 Draw the amino acids and peptide fragments...Ch. 29 - Prob. 29.59PCh. 29 - Prob. 29.60PCh. 29 - Prob. 29.61PCh. 29 - 29.59 An octapeptide contains the following amino...Ch. 29 - Prob. 29.63PCh. 29 - Prob. 29.64PCh. 29 - Draw all the steps in the synthesis of each...Ch. 29 - 29.62 Write out the steps for the synthesis of...Ch. 29 - 29.64 Another method to form a peptide bond...Ch. 29 - Prob. 29.68PCh. 29 - Prob. 29.69PCh. 29 - Which of the following amino acids are typically...Ch. 29 - After the peptide chain of collagen has been...Ch. 29 - Prob. 29.72PCh. 29 - Prob. 29.73PCh. 29 - 29.70 The anti-obesity drug orlistat works by...Ch. 29 - Prob. 29.75P
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