Organic Chemistry
8th Edition
ISBN: 9781305580350
Author: William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Publisher: Cengage Learning
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Question
Chapter 27, Problem 27.42P
(a)
Interpretation Introduction
Interpretation:
The number of different tetra peptides can be made when the tetra peptide contains one unit of each of Asp, Glu, Pro and Phe has to be given.
Concept Introduction:
The amino acids Asp, Glu, Pro and Phe has to be repeated only once in a combination and all four amino acids can be used for different combinations. So, based on this condition, the number of amino acids formed can be calculated.
(b)
Interpretation Introduction
Interpretation:
The number of different tetra peptides can be made when the all 20 amino acids can be used each only once has to be given.
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Chapter 27 Solutions
Organic Chemistry
Ch. 27.1 - Of the 20 protein-derived amino acids shown in...Ch. 27.2 - Prob. 27.2PCh. 27.2 - Prob. 27.3PCh. 27.3 - Draw a structural formula for Lys-Phe-Ala. Label...Ch. 27.4 - Which of these tripeptides are hydrolyzed by...Ch. 27.4 - Deduce the amino acid sequence of an undecapeptide...Ch. 27.6 - Prob. 27.7PCh. 27 - What amino acid does each abbreviation stand for?...Ch. 27 - The configuration of the chiral center in -amino...Ch. 27 - Assign an R or S configuration to the chiral...
Ch. 27 - Prob. 27.11PCh. 27 - Prob. 27.12PCh. 27 - Draw zwitterion forms of these amino acids. (a)...Ch. 27 - Prob. 27.14PCh. 27 - Why is Arg often referred to as a basic amino...Ch. 27 - Prob. 27.16PCh. 27 - Prob. 27.17PCh. 27 - Prob. 27.18PCh. 27 - Prob. 27.19PCh. 27 - Prob. 27.20PCh. 27 - Both norepinephrine and epinephrine are...Ch. 27 - Prob. 27.22PCh. 27 - Draw a structural formula for the form of each...Ch. 27 - Prob. 27.24PCh. 27 - Write the zwitterion form of alanine and show its...Ch. 27 - Prob. 27.26PCh. 27 - Write the form of aspartic acid most prevalent at...Ch. 27 - Prob. 27.28PCh. 27 - Prob. 27.29PCh. 27 - For lysine and arginine, the isoelectric point,...Ch. 27 - Prob. 27.31PCh. 27 - Account for the fact that the isoelectric point of...Ch. 27 - Prob. 27.33PCh. 27 - Prob. 27.34PCh. 27 - At pH 7.4, the pH of blood plasma, do the majority...Ch. 27 - Prob. 27.36PCh. 27 - Prob. 27.37PCh. 27 - Prob. 27.38PCh. 27 - A chemically modified guanidino group is present...Ch. 27 - Draw a structural formula for the product formed...Ch. 27 - Prob. 27.41PCh. 27 - Prob. 27.42PCh. 27 - A decapeptide has the following amino acid...Ch. 27 - Following is the primary structure of glucagon, a...Ch. 27 - Prob. 27.45PCh. 27 - Draw a structural formula of these tripeptides....Ch. 27 - Estimate the pI of each tripeptide in Problem...Ch. 27 - Glutathione (G-SH), one of the most common...Ch. 27 - Following are a structural formula and a...Ch. 27 - Prob. 27.50PCh. 27 - Prob. 27.51PCh. 27 - Prob. 27.52PCh. 27 - Prob. 27.53PCh. 27 - Prob. 27.54PCh. 27 - Distinguish between intermolecular and...Ch. 27 - Prob. 27.56PCh. 27 - Prob. 27.57P
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- The following compound is an intermediate in the biosynthesis of one of the 20 common -amino acids. Which one is it likely to be, and what kind of chemical change must take place to complete the biosynthesis?arrow_forwardWhich amino acids could be referred to as derivatives of butanoic acid?arrow_forwardGive the sequence of the following tetrapeptide:arrow_forward
- 22-42 (a) How many atoms of the peptide bond lie in the same plane? (b) Which atoms are they?arrow_forward22-47 How many different tetrapeptides can be made (a) if the peptides contain the residues of asparagine, proline, serine, and metbionine and (b) if all 20 amino acids can be used?arrow_forwardGlutathione (G-SH), one of the most common tripeptides in animals, plants, and bacteria, is a scavenger of oxidizing agents. In reacting with oxidizing agents, glutathione is converted to G-S-S-G. (a) Name the amino acids in this tripeptide. (b) What is unusual about the peptide bond formed by the N-terminal amino acid? (c) Write a balanced half-reaction for the reaction of two molecules of glutathione to form a disulfide bond. Is glutathione a biological oxidizing agent or a biological reducing agent? (d) Write a balanced equation for reaction of glutathione with molecular oxygen, O2 to form G-S-S-G and H2O. Is molecular oxygen oxidized or reduced in this process?arrow_forward
- On complete hydrolysis, a polypeptide gives two alanine, one leucine, one methionine, one phenylalanine, and one valine residue. Partial hydrolysis gives the following fragments: Ala-Phe, Leu-Met, Val-Ala, Phe-Leu. It is known that the first amino acid in the sequence is valine and the last one is methionine. What is the complete sequence of amino acids?arrow_forwardDraw the structure of the following tripeptide, and label its N-terminal and Cterminal amino acids: Ala–Gly–Ser ?arrow_forwardIdentify the chemical type of each compound (2a to 2c), according to the options given in the Answer Book. On the diagram , CIRCLE all the chiral centres in EACH On the diagram , label acetal and hemiketal moieties, and peptide bonds. Indicate and name the bond that links the two saccharides in the disaccharide. Sketch the reaction of hydrolysis of the peptide, clearly drawing the reactants and products. Using one-letter codes, identify the dinucleotide sequence and state whether this is a DNA or RNA dinucleotide. Sketch the reaction of formation of the dinucleotide from its constituent nucleotides, clearly drawing reactants and products, and state which kind of reaction it is.arrow_forward
- As a genetic engineer, you have been given the following task:alter a protein’s structure by converting a specific amino acidsequence that forms an extended a-helix to one that formsa b-barrel. What types of amino acid are probably in thea-helix, and which ones would you need to substitute?arrow_forwardA tetrapeptide is given as: Ser-Lys-Ala-Phe. Which statement is true? a. The listing should be in alphabetical order. b. There are four peptide bonds because there are four amino acids. c. The serine provided a nitrogen for the peptide bond. d. The N-terminus is serine (Ser).arrow_forwardDraw out the peptide IYV and clearly label/identify all the Phi, Psi, and peptide bonds present in the peptide. Be sure to draw out the entire peptide and label the N- and C-termini. Which type of secondary structure would this peptide most likely take on (assuming it would take on a secondary structure)?.arrow_forward
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Nucleic acids - DNA and RNA structure; Author: MEDSimplified;https://www.youtube.com/watch?v=0lZRAShqft0;License: Standard YouTube License, CC-BY