BIOCHEMISTRY (LL)
9th Edition
ISBN: 9781337805100
Author: Campbell
Publisher: CENGAGE L
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Textbook Question
Chapter 5, Problem 44RE
REFLECT AND APPLY What would happen during an amino acid sequencing experiment using the Edman degradation if you accidentally added twice as much Edman reagent (on a per-mole basis) as the peptide you were sequencing?
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12. When glutamic acid is heated to 180°C., it loses a molecule of water to form a
lactam. The bond that creates the lactam is an amide bond that forms between the
amino nitrogen and the carbon of the side chain -COOH group. What is the most
reasonable structure for this lactam? (NOTE: The structure of glutamic acid is shown
in Question 1.)
COOH
COOH
ا کچھ جو کچھ
C
D
COOH
B
COOH
E
COOH
10. Which one of the
following compounds is
the major organic product
of the series of reactions
shown here?
Ph
A
OH
Ph
B
CO₂Et
Br
-H
Ν ΚΑ
CO₂Et
1. NaOEt
1. NaOH, H₂O
2. H3O+
2. PhCH2CH2Br
3. heat
NH2
Ph
OH
NH2
0
OH
Ph
OH
NH2
Ph
D
NH2
E
OH
1. What is the isoelectric point of glutamic acid?
(Glutamic acid has pKa1 2.10, pKa2 4.07, pKaз 9.47)
A) pH 2.1
D) pH 6.8
B) pH 3.1
C) pH 4.1
E) pH 9.5
HO
NH2
Glutamic acid
(shown without charges)
OH
Chapter 5 Solutions
BIOCHEMISTRY (LL)
Ch. 5 - RECALL What types of homogenization techniques are...Ch. 5 - RECALL When would you choose to use a...Ch. 5 - RECALL What is meant by salting out? How does it...Ch. 5 - RECALL What differences between proteins are...Ch. 5 - RECALL How could you isolate mitochondria from...Ch. 5 - RECALL Can you separate mitochondria from...Ch. 5 - RECALL Give an example of a scenario in which you...Ch. 5 - Prob. 8RECh. 5 - REFLECT AND APPLY You are purifying a protein for...Ch. 5 - Prob. 10RE
Ch. 5 - RECALL What is the basis for the separation of...Ch. 5 - RECALL What is the order of elution of proteins on...Ch. 5 - RECALL What are two ways that a compound can be...Ch. 5 - Prob. 14RECh. 5 - RECALL Why do most people elute bound proteins...Ch. 5 - RECALL What are two types of compounds that make...Ch. 5 - RECALL Draw an example of a compound that would...Ch. 5 - RECALL How can gel-filtration chromatography be...Ch. 5 - REFLECT AND APPLY Sephadex G-75 has an exclusion...Ch. 5 - Prob. 20RECh. 5 - RECALL What is the main difference between reverse...Ch. 5 - RECALL How does HPLC differ from ion-exchange...Ch. 5 - REFLECT AND APPLY Design an experiment to purify...Ch. 5 - REFLECT AND APPLY Referring to Question 23, how...Ch. 5 - Prob. 25RECh. 5 - REFLECT AND APPLY You wish to separate and purify...Ch. 5 - REFLECT AND APPLY An amino acid mixture consisting...Ch. 5 - REFLECT AND APPLY An amino acid mixture consisting...Ch. 5 - REFLECT AND APPLY In reverse-phase HPLC, the...Ch. 5 - REFLECT AND APPLY Gel-filtration chromatography is...Ch. 5 - RECALL What physical parameters of a protein...Ch. 5 - RECALL What types of compounds make up the gels...Ch. 5 - RECALL Of the two principal polymers used in...Ch. 5 - RECALL What types of macromolecules are usually...Ch. 5 - RECALL If you had a mixture of proteins with...Ch. 5 - RECALL What does SDSPAGE stand for? What is the...Ch. 5 - RECALL How does the addition of sodium...Ch. 5 - RECALL Why is the order of separation based on...Ch. 5 - RECALL The accompanying figure is from an...Ch. 5 - Prob. 40RECh. 5 - Prob. 41RECh. 5 - Prob. 42RECh. 5 - Prob. 43RECh. 5 - REFLECT AND APPLY What would happen during an...Ch. 5 - REFLECT AND APPLY A sample of an unknown peptide...Ch. 5 - REFLECT AND APPLY A sample of a peptide of unknown...Ch. 5 - REFLECT AND APPLY You are in the process of...Ch. 5 - REFLECT AND APPLY You are in the process of...Ch. 5 - Prob. 49RECh. 5 - Prob. 50RECh. 5 - Prob. 51RECh. 5 - Prob. 52RECh. 5 - Prob. 53RECh. 5 - Prob. 54RECh. 5 - RECALL What is the basis for the technique called...Ch. 5 - Prob. 56RECh. 5 - Prob. 57RECh. 5 - RECALL What are the main procedures involved in a...Ch. 5 - RECALL Where did western blot get its name?Ch. 5 - Prob. 60RECh. 5 - Prob. 61RECh. 5 - Prob. 62RECh. 5 - Prob. 63RECh. 5 - Prob. 64RECh. 5 - Prob. 65RE
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- Br Mg, ether 1. HCHO (formaldehyde) 2. H+, H₂O PCC 1. NH3, HCN ? (pyridinium chlorochromate) 2. H2O, HCI 11. Which one of the following compounds is the major organic product of the series of reactions shown above? Ph. Ph. OH NH2₂ A Ph. Ή NH2 B OH Ph Η Ph OH NH2 NH2₂ NH₂ C D Earrow_forwardB A 6. Which ONE of the labeled bonds in the tripeptide on the right is a peptide bond: H₂N N 'N' OH C H A, B, C, D or E? HN E OHarrow_forwardQuestions 8-9 are 0.4 points each. The next two questions relate to the peptide whose structure is shown here. To answer these questions, you should look at a table of H2N/.. amino acid structures. You don't have to memorize the structures of the amino acids. IZ 8. What is the N-terminal amino acid of this peptide? A) proline B) aspartic acid C) threonine 9. What is the C-terminal amino acid of this peptide? A) proline B) aspartic acid C) threonine N OH D) valine E) leucine D) valine E) leucine NH "OH OHarrow_forward
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