8th Edition

ISBN: 9780134326061

Author: McMurry

Publisher: PEARSON CO

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In simple words, osmosis is the slow, gradual movement of a liquid through a membrane. But there are nuances to this process. For instance, there has to be an imbalance in the distribution of solute in the liquid on either side of the membrane, which has…

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Chapter 18, Problem 18.53AP

At neutral pH, which of the following amino acids has a net positive charge, which has a net negative charge, and which is neutral? (Hint: Draw the various charged forms of each amino acid before deciding.)

(a) Aspartic acid

(b) Histidine

(c) Valine

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Chapter 18, Problem 18.52AP

Chapter 18, Problem 18.54AP

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A protein biochemist attempted to determine the amino acid sequence of a decapeptide. The results from the trypsin, chymotrypsin, and cyanogen bromide treatments are shown: ⚫ Trypsin digestion gave two fragments with multiple residues (not in order): • T1: Ala, Arg, Phe, Gly, Thr, Trp, Tyr o T2: Lys, Met, Val Chymotrypsin digestion gave four fragments with multiple residues (not in order): • CT1: Ala, Phe • CT2: Thr, Trp • CT3: Lys, Met, Tyr, Val 。 CT4: Arg, Gly ⚫ Treatment with cyanogen bromide yielded a single amino acid, methionine, and a nonapeptide. What is a possible sequence of the decapeptide? Use three-letter abbreviations in your answer, and add a dash between each residue.

A protein biochemist attempted to determine the amino acid sequence of a decapeptide. The results from the trypsin, chymotrypsin, and cyanogen bromide treatments are shown: • Trypsin digestion gave two fragments with multiple residues (not in order): T1: Ala, Arg, Phe, Gly, Thr, Trp, Tyr • T2: Lys, Met, Val Chymotrypsin digestion gave four fragments with multiple residues (not in order): • CTI: Ala, Phe 。 CT2: Thr, Trp • CT3: Lys, Met, Tyr, Val 。 CT4: Arg, Gly ⚫ Treatment with cyanogen bromide yielded a single amino acid, methionine, and a nonapeptide. What is a possible sequence of the decapeptide? Use three-letter abbreviations in your answer, and add a dash between each residue.

Poly-L-leucine in an organic solvent such as dioxane is a helical, whereas poly-L-isoleucine is not. Why do these amino acids with the same number and kinds of atoms have different helix-forming tendencies? L-isoleucine's methyl group sterically interferes with α-helix formation, whereas L-leucine's methyl group does not interfere. L-isoleucine lacks an NH group that can donate a hydrogen bond to stabilize an a helix, whereas L-leucine has an NH group. L-isoleucine contains a hydrogen-bond acceptor in close proximity to the main chain, whereas L-leucine lacks this group. L-isoleucine's ring structure prevents it from assuming the op value to fit into an a helix, whereas L-isoleucine does not have a ring structure.

Chapter 18 Solutions

EP FUND.OF GENERAL,ORG...-MOD.MASTERING

Ch. 18.2 - Prob. 18.1P Ch. 18.2 - Prob. 18.2P Ch. 18.3 - Prob. 18.3P Ch. 18.3 - Examine the ball-and-stick model of valine in the...Ch. 18.3 - Indicate whether each of the following molecules...Ch. 18.3 - Prob. 18.6P Ch. 18.3 - Prob. 18.7KCP Ch. 18.3 - Prob. 18.8P Ch. 18.3 - Prob. 18.9P Ch. 18.3 - Prob. 18.10P

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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biochemistry and related others by exploring similar questions and additional content below.

At neutral pH, which of the following amino acids has a net positive charge, which has a net negative charge, and which is neutral? (Hint: Draw the various charged forms of each amino acid before deciding.) (a) Aspartic acid (b) Histidine (c) Valine

Solution Summary: The author explains that amino acids are linked together through amide bonds to form a biologically large molecule known to be proteins.

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