Fundamentals of Biochemistry: Life at the Molecular Level
5th Edition
ISBN: 9781118918401
Author: Donald Voet, Judith G. Voet, Charlotte W. Pratt
Publisher: WILEY
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Chapter 17, Problem 5E
Summary Introduction
To explain: Which reaction out of five is most likely an irreversible
Concept introduction: Pyruvate dehydrogenase complex is a group of non-covalently associated enzymes. It catalyzes pyruvate into acetyl CoA. The reaction that is energetically unfavorable is most likely to be irreversible.
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3. (15 points) Living cells homogeneously distributed
(immobilized) with an agarose gel require glucose to survive.
An important aspect of the biochemical system design is the
effective diffusion coefficient of glucose (A) into the cell-
immobilized gel. Consider the experiment shows below where
a slab of the cell-immobilized gel of 1.0cm thickness is placed
within a well-mixed aqueous solution of glucose maintained at
a concentration of 50 mmol/L. The glucose consumption
within the cell-immobilized gel proceeds by a zero-order
process given by R₁ = -0.05 mmol/(L min). The solubilities of
glucose in both the water and the gel are the same; that is, the
concentration of the glucose on the water side of the water-gel
interface is equal to the concentration of the glucose on the gel
side of the water gel interface. A syringe is mounted at the
center of the gel carefully excises a tiny sample of the gel for
glucose analysis.
A
Well mixed solution
Constant
concentration
50nmol/L
Living…
Two tetrapeptides were isolated from a possum's sweat glands. These peptides were sequenced using Edman degradation and the following 2 sequences were obtained:
Gly-Asp-Ala-Leu
Gly-Asp-Asp-Leu
Can you please help show the titration curve for both of these peptides and calculate the PI?
Two tetrapeptides were isolated from a possum's sweat glands. These peptides were sequenced using Edman degradation and the following 2 sequences were obtained:
Gly-Asp-Ala-Leu
Gly-Asp-Asp-Leu
What is the structure of the PTH derivative produced during the last round of amino acid sequencing?
Chapter 17 Solutions
Fundamentals of Biochemistry: Life at the Molecular Level
Ch. 17 - Prob. 1ECh. 17 - 2. If acetyl-CoA is labeled with l4C at its methyl...Ch. 17 - 3. List four possible metabolic fates for pyruvate...Ch. 17 - 4. Explain why metabolic acidosis (Box 2-2) may...Ch. 17 - 5. Which one of the live steps of the pyruvate...Ch. 17 - Prob. 6ECh. 17 - 7. Photosynthetic organisms use elaborate...Ch. 17 - 6. Does the pyruvate-formate lyase reaction...Ch. 17 - Prob. 9ECh. 17 - Prob. 10E
Ch. 17 - Prob. 11ECh. 17 - 12. What citric acid cycle intermediates would...Ch. 17 - Prob. 13ECh. 17 - Prob. 14ECh. 17 - Prob. 15ECh. 17 - 16. What is the ratio of [isocitrate] to [citrate]...Ch. 17 - 17. Explain why a deficiency of pyruvate...Ch. 17 - Prob. 18ECh. 17 - Prob. 19ECh. 17 - Prob. 20ECh. 17 - 21. Helicobacter pylori, which causes gastric...Ch. 17 - Prob. 22ECh. 17 - Prob. 23CQCh. 17 - 24. Which compounds would accumulate in an...Ch. 17 - Prob. 25CQCh. 17 - 26. Certain microorganisms with an incomplete...Ch. 17 - Prob. 27CQCh. 17 - Prob. 28CQCh. 17 - Prob. 29CQCh. 17 - Prob. 30CQCh. 17 - 31. Anaplerotic reactions permit the citric acid...Ch. 17 - 32. Although animals cannot synthesize glucose...Ch. 17 - Prob. 33CQCh. 17 - Prob. 34CQCh. 17 - Prob. 35CQCh. 17 - 36. Acetyl-CoA, in addition to providing 2-carbon...Ch. 17 - Prob. 1MTE
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- What is the primary sequence of this undecapeptide? Also, if x-ray crystallography shows a highly stable hairpin turn within the polypeptide, what about the primary sequence explains this structural feature?arrow_forwardDraw the product of this reaction. Ignore inorganic byproducts. H H ⚫OH HO- -H H- -OH H- -OH CH2OH Ag*, NH4OH, H2O Draw Fischer Projectionarrow_forwardDraw the product of this reaction. Ignore inorganic byproducts. H₂O -OH H ⚫OH HO H HO- CH2OH Cu2+ Draw Fischer Projectionarrow_forward
- Draw the product of this reaction. Ignore inorganic byproducts. H、 H -OH H ⚫OH H -OH CH2OH Fehlings' solution ⑤ Draw Fischer Projectionarrow_forwardDraw the product of this reaction. Ignore inorganic byproducts. HO C=0 H ⚫OH H ⚫OH HO- H HO H CH2OH Tollens' solution Draw Fischer Projectionarrow_forwardDraw the product of this reaction. Ignore inorganic byproducts. H-C=O HO H HO H H- ⚫OH HO H CH2OH HNO3, H2O Draw Fischer Projectionarrow_forward
- Draw the product of this reaction. Ignore inorganic byproducts. HO HO- HO H HO ∙H HO CH2OH NaBH4, CH3OH Draw Fischer Projectionarrow_forwardDraw the product of this reaction. Ignore inorganic byproducts. Но сво HO H HO H H OH H -OH CH2OH H2 Pd Draw Fischer Projectionarrow_forwardDraw the Haworth projection for Gulose-ẞ-1,6-sorbose and answer the following questions. (Gulose will be in the pyranose form and Sorbose will be in the furanose form) a. Label the reducing and nonreducing ends of the disaccharide b. Label the glycosidic bond c. Circle the anomeric carbons and label them as hemiacetals or acetals. d. Can this disaccharide undergo mutarotation?arrow_forward
- Draw the product of the reaction below. Ignore inorganic byproducts. H OH HO HO HO ·H H OH H OH excess CH3CH2I KOHarrow_forwardDraw the Haworth structures for the following: a. α-D-Gulopyranose b. ẞ-D-Sorbofuranose c. The two possible isomers of a-D-altrose (furanose and pyranose forms)arrow_forwardDraw the product of this reaction. Ignore inorganic byproducts. HO H ⚫OH HO- ∙H H- -OH H ⚫OH CH2OH HNO3, H2Oarrow_forward
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