Organic Chemistry (9th Edition)
9th Edition
ISBN: 9780321971371
Author: Leroy G. Wade, Jan W. Simek
Publisher: PEARSON
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Textbook Question
Chapter 24.4, Problem 24.5P
Draw the resonance forms of a protonated guanidino group, and explain why arginine has such a strongly basic isoelectric point.
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Draw the resonance forms of a protonated guanidino group, and explain why argininehas such a strongly basic isoelectric point
Explain why, when the guanidino group of arginine is protonated, the double-bonded nitrogen is the nitrogen that accepts the proton.
Compound A is Arginine
Chapter 24 Solutions
Organic Chemistry (9th Edition)
Ch. 24.2A - Draw three-dimensional representations of the...Ch. 24.2A - Prob. 24.2PCh. 24.2B - The herbicide glyphosate (Roundup) kills plants by...Ch. 24.4 - Draw the structure of the predominant form of a....Ch. 24.4 - Draw the resonance forms of a protonated guanidino...Ch. 24.4 - Although tryptophan contains a heterocyclic amine,...Ch. 24.4 - Prob. 24.7PCh. 24.4 - Prob. 24.8PCh. 24.5A - Show how the following amino acids might be formed...Ch. 24.5B - Prob. 24.10P
Ch. 24.5C - Prob. 24.11PCh. 24.5C - Show how you would use a Strecker synthesis to...Ch. 24.6 - Suggest how you would separate the free i-ammo...Ch. 24.7A - Propose a mechanism for the acid-catalyzed...Ch. 24.7A - Give equations for the formation and...Ch. 24.7B - Prob. 24.16PCh. 24.7C - Prob. 24.17PCh. 24.8B - Draw the complete structures of the following...Ch. 24.9C - Prob. 24.19PCh. 24.9C - Prob. 24.20PCh. 24.9C - Prob. 24.21PCh. 24.9E - Prob. 24.22PCh. 24.9E - Prob. 24.23PCh. 24.10A - Propose a mechanism for the coupling of acetic...Ch. 24.10B - Show how you would synthesize Leu-Gly-Ala-Val-Phe...Ch. 24.10B - Show how solid-phase peptide synthesis would be...Ch. 24 - a. The isoelectric point (pl) of phenylalanine is...Ch. 24 - Prob. 24.28SPCh. 24 - Prob. 24.29SPCh. 24 - Prob. 24.30SPCh. 24 - Prob. 24.31SPCh. 24 - Suggest a method for the synthesis of the...Ch. 24 - Prob. 24.33SPCh. 24 - Write the complete structures for the following...Ch. 24 - The following structure is drawn in an...Ch. 24 - Prob. 24.36SPCh. 24 - Prob. 24.37SPCh. 24 - Show the steps and intermediates in the synthesis...Ch. 24 - Prob. 24.39SPCh. 24 - Lipoic acid is often found near the active sites...Ch. 24 - Prob. 24.41SPCh. 24 - Prob. 24.42SPCh. 24 - Prob. 24.43SPCh. 24 - Complete hydrolysis of an unknown basic...Ch. 24 - Prob. 24.45SPCh. 24 - Prob. 24.46SPCh. 24 - Prob. 24.47SP
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- Explain why, when the guanidino group of arginine is protonated, the double-bonded nitrogen is thenitrogen that accepts the proton. 2 H+ + NH2NHCH2CH2CH2CHNH +NH3CO−O CO−O H2NC NHCH2CH2CH2CHarrow_forwardWhy is the pKa of the arginine side chain greater than the pKa of the lysine side chain?arrow_forwardWhat type of interaction (IMF) would be present between side chains of the following amino acid residues? Explain your answers. a) 2 phenylalanine residues b) Methionine and valine residues c) Glutamate and arginine residuesarrow_forward
- Calculate the attraction between an arginine and glutamate at pH 7 under thefollowing conditions:a) in air, spaced 5 Å apartb) in water, spaced 5 Å apartc) in ethanol, spaced 5 Å apartarrow_forwardWhat is the isoelectric point for the peptide MNPQR at pH 7? Draw the structure, including the stereochemistry of each C-alpha chiral center.arrow_forwardExplain the formation of thioether-linked prenyl anchor proteinsarrow_forward
- (a) Draw the structure of the two possible dipeptides that can be formed by combining valine and phenylalanine. (b) In each dipeptide, label the N- and C-terminal amino acids. (c) Name each peptide using three-letter symbols.arrow_forward22-29 Draw the structure of a tripeptide made of threomne, arginine, and methionine.arrow_forward22-64 If both cysteine residues on the B chain of insulin were changed to alanine residues, how would it affect the quaternary structure of insulin?arrow_forward
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