BIOCHEM. II-EBOOK ACCESS>CUSTOM<
18th Edition
ISBN: 9781337700320
Author: GARRETT
Publisher: CENGAGE LEARNING (CUSTOM)
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Chapter 6, Problem 19P
Answers to all problems are at the end of this book. Detailed solutions are available in the Student Solutions Manual, Study Guide, and Problems Book.
To fully appreciate the elements of secondary structure in proteins, it is useful to have a practical sense of their structures. On a piece of paper, draw a simple but large zigzag pattern to represent a β-strand. Then fill in the structure, drawing the locations of the moms of the chain on this zigzag pattern. Then draw a simple, large coil on a piece of paper to represent an
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1
Chapter 6 Solutions
BIOCHEM. II-EBOOK ACCESS>CUSTOM<
Ch. 6 - Answers to all problems are at the end of this...Ch. 6 - Answers to all problems are at the end of this...Ch. 6 - Answers to all problems are at the end of this...Ch. 6 - Answers to all problems are at the end of this...Ch. 6 - Answers to all problems are at the end of this...Ch. 6 - Answers to all problems are at the end of this...Ch. 6 - Answers to all problems are at the end of this...Ch. 6 - Answers to all problems are at the end of this...Ch. 6 - Answers to all problems are at the end of this...Ch. 6 - Answers to all problems are at the end of this...
Ch. 6 - Answers to all problems are at the end of this...Ch. 6 - Answers to all problems are at the end of this...Ch. 6 - Answers to all problems are at the end of this...Ch. 6 - Answers to all problems are at the end of this...Ch. 6 - Answers to all problems are at the end of this...Ch. 6 - Answers to all problems are at the end of this...Ch. 6 - Answers to all problems are at the end of this...Ch. 6 - Answers to all problems are at the end of this...Ch. 6 - Answers to all problems are at the end of this...Ch. 6 - Answers to all problems are at the end of this...Ch. 6 - Answers to all problems are at the end of this...Ch. 6 - Answers to all problems are at the end of this...Ch. 6 - Answers to all problems are at the end of this...
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- Do schwann cells produce or act as myelin in the peripheral nervous system? I know that they encase and wrap around axons, but where does the myelin come into play?arrow_forwardThe enzyme lactate dehydrogenase (LDH) catalyzes the conversion of pyruvate to lactatein skeletal muscle cells using NAD/NADH during anaerobic “balanced” fermentation.Answer the following questions about this reaction. (a) Write out the two reductive half reactions and indicate the E ̊' for each half reaction. Write out the full balanced reaction for the pyruvate to lactate rxn and indicate the ∆E ̊' for the reaction. (b) What is the free energy change under standard state conditions for thisreaction? Which direction is spontaneous?(c) Assume that in skeletal muscle cells the ratio of [NAD+] to [NADH] is 100, and that the[pyruvate] = 0.40 mM and [lactate] = 4.0 mM. What is the free energy change (∆G')for the conversion of pyruvate to lactate? Indicate the direction in which the reactionis spontaneous under these cellular conditions.arrow_forwardWhy did the authors worry about the temperature-dependent solubility of the carriers in thebilayer? How did the authors determine whether the effect of freezing the lipid bilayer wasto decrease the solubility of the carriers (nonactin and valinomycin) or whether the effectwas to impair their ability to diffuse through the membrane (decrease their mobility)?arrow_forward
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- A typical integral membrane protein has a stretch (or stretches) of ~20 hydrophobic aminoacids that form an α-helix that spans the bilayer (as is found in membrane proteins such asglycophorin A and bacteriorhodopsin). Compare and contrast the molecular and structural features of gramicidin with a membrane-spanning α-helix. Explain how gramicidin can forman ion channel when a typical membrane-spanning α-helix cannot (eg, glycophorin A).arrow_forwardThe titration curve of alanine shows the ionization of two functional groups with pK values of 2.34 and 9.69, corresponding to the ionization of the carboxyl and the protonated amino groups, respectively. The titration of di-, tri-, and larger oligopeptides of alanine also shows the ionization of only two functional groups, although the experimental pK values are different. The table summarizes the trend in pK values. Amino acid or peptide Ala Ala-Ala pKj pk₂ 2.34 9.69 3.12 8.30 Ala-Ala-Ala 3.39 8.03 Ala-(Ala)-Ala, n ≥ 4 3.42 7.94 Modify the molecules to show the oligopeptide Ala-Ala-Ala. You can modify the molecules by moving, adding, deleting, or changing atoms, bonds, or charges. C Select c Draw Templates More H с N 0 S Cl H H | | || H CH3 H CH, H CH₂ Complete the statements about the the pK, values of the Ala-Ala-Ala oligopeptide. The pK₁ value of 3.39 is associated with the -COO group of Ala-Ala-Ala. The pK2 value of 8.03 is associated with the -NH group of Ala-Ala-Ala. Erase Q2 Q…arrow_forwardFacts from the bacterium mals and to dept kan apa in a peptide with antidic properties. This peptide complex with the call membrance of other hacterial species, leading in bacterial death The structure of the peptide has been determined from (a) Cmplete acid hydes of the peptide, followed by amino acid analys, yielded quiar anunt of Lan, Om, Pfx, Prxa, and Wall Cmtiti, an amino acid od prosentin pockets but present in some peptides. Com has the tracture H *H,N-CH-CH-CH, -C- COO (b) The weight of the peptide in approximately 1,200 Th (c) The peptide failed to undergo hydrolysis when treated with the Hydrolysis of the carbonyl-terminal residue of a polypeptide une "NH, the year. This call there Pro or the police does not contain a froz (d) Treatment of the peptide with 1-haw-2,4-dicherer (11N1), followed by complete hydrolysis and ched only from and the derivative NO, Н ON NHCHI CH, CH, C coo +NH, (Hint: The 2,4-diphenyl derivative involves the amino group of a side chain rather than the…arrow_forward
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