Essential Organic Chemistry, Global Edition
3rd Edition
ISBN: 9781292089034
Author: Paula Yurkanis Bruice
Publisher: PEARSON
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Chapter 17, Problem 41P
(a)
Interpretation Introduction
Interpretation:
The location and type of charge of given hexapeptide at
(b)
Interpretation Introduction
Interpretation:
The location and type of charge of given hexapeptide at
(c)
Interpretation Introduction
Interpretation:
The location and type of charge of given hexapeptide at pH 7.0 has to be drawn.
(d)
Interpretation Introduction
Interpretation:
The location and type of charge of given hexapeptide at
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4.Look carefully at the following polypeptide chain and use its structure to answer the
following questions.(1+1+1+1+2)
S.
+
H3N.
`N'
ČH3 H
a. Provide the sequence for the peptide using the 3-letter abbreviations.
b. Which amino acid is the N-terminus? Which amino acid is the C-terminus?
c. Circle the side chains and classify them as non-polar, polar, acidic, or basic.
d. Name at least three amino acids whose side chains have the characteristic of being
able to repel water.
e. Look at the following disulfide bridge. Cleavage of the disulfide bridge will occur
via a reduction reaction; sketch the products at physiological pH. Circle and identify
any functional groups in each product.
H;C
OH
NH2
5.a. What is the biochemical test for a reducing sugar (all monosaccharides and disaccharides
EXCEPT sucrose) and what result will indicated a positive test?
b. Name the disaccharide formed when you join the following monosaccharides in a
condensation reaction. 1. Glucose and glucose 2. Glucose…
What is the charge of the peptide, CALSI, at pH 7?
+3
+2
+1
-1
-2
-3
What is the net charge of the tetrapeptide
C-R-Y-K at pH 11.5
Chapter 17 Solutions
Essential Organic Chemistry, Global Edition
Ch. 17.1 - a. Explain why, when the imidazole ring of...Ch. 17.2 - Prob. 2PCh. 17.3 - Prob. 3PCh. 17.3 - Prob. 4PCh. 17.3 - Prob. 6PCh. 17.4 - Calculate the pI of each of the following amino...Ch. 17.4 - a. Which amino acid has the lowest pI value? b....Ch. 17.5 - What aldehyde is formed when valine is treated...Ch. 17.5 - Prob. 10PCh. 17.5 - Prob. 11P
Ch. 17.5 - Prob. 12PCh. 17.6 - Prob. 13PCh. 17.6 - What amino acid would be formed using the...Ch. 17.6 - What amino acid would be formed when the aldehyde...Ch. 17.7 - Pig liver esterase is an enzyme that catalyzes the...Ch. 17.8 - Prob. 17PCh. 17.8 - Prob. 18PCh. 17.8 - Prob. 19PCh. 17.8 - Prob. 20PCh. 17.10 - Prob. 21PCh. 17.10 - Prob. 22PCh. 17.10 - Why does cyanogen bromide not cleave on the C-side...Ch. 17.10 - Prob. 24PCh. 17.10 - Prob. 26PCh. 17.12 - Prob. 27PCh. 17.13 - a. Which would have the greatest percentage of...Ch. 17 - Draw the predominant form of the following amino...Ch. 17 - What is the pI of serine?Ch. 17 - Prob. 31PCh. 17 - Prob. 32PCh. 17 - Which would have a higher percentage of negative...Ch. 17 - Draw the form of aspartate that predominates at...Ch. 17 - Prob. 35PCh. 17 - A professor was preparing a manuscript for...Ch. 17 - a. Why is the pKa of the glutamate side chain...Ch. 17 - Prob. 38PCh. 17 - Determine the amino acid sequence of a polypeptide...Ch. 17 - Prob. 40PCh. 17 - Prob. 41PCh. 17 - Three peptides were obtained from a trypsin...Ch. 17 - Prob. 43PCh. 17 - After the polypeptide shown here was treated with...Ch. 17 - The disulfide bridges of a polypeptide were...Ch. 17 - -Amino acids can be prepared by treating an...Ch. 17 - Reaction of a polypeptide with carboxypeptidase A...Ch. 17 - Prob. 48PCh. 17 - Prob. 49PCh. 17 - Show how valine can be prepared by a. a Strecker...Ch. 17 - Prob. 51PCh. 17 - Why is proline never found in an -helix?Ch. 17 - Determine the amino acid sequence of a polypeptide...Ch. 17 - Prob. 55PCh. 17 - A chemist wanted to test his hypothesis that the...Ch. 17 - A normal polypeptide and a mutant of the...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.Similar questions
- Chemistry 11. What is the net charge on the peptide Ala-Arg-His-Ser-Lys-Glu-Thr-Pro-Tyr-Gln-Asn-Arg-His-Ile at pH 7.0? Use the pK, values in Table 3.1. A) +2.0 B)-2.0 C) +1.0 D) -1.0 E) 0.0arrow_forwardThe isoelectric point of the tripeptide Gly-Ser-Ala occurs at a value below pH 7 at pH 7 at a value above pH 7 C neverarrow_forwardQUESTION 31 Copy of The following reaction scheme shows the states of the amino acid hisitdine. Histidine has three pKa's - 2, 6 and 9.2. Which form of Histidine predominates at pH of 5? "H3N-CH-C-O° CH2 H2N-CH-C-O- *H3N-CH-C–OH CH2 *H3N-CH-C-o- CH2 CH2 *HN +HN NH -NH NH -NH A C O A. A O B. B O C. C D. D E. The answer cannot be determined with information given.arrow_forward
- 3. Which of the following amino acids would be negative at pH = 7? A. P B. V C. E D. K 4. What is the expected pl of Arginine? A. pH = 2 B. pH = 7 C. pH = 10 D. pH = 14arrow_forwardWhat is the charge of the Peptide DMQK at pH=7 ? A) -2 B) 0 C) -1 D) +2arrow_forward12. Draw the products of the acid-catalyzed hydrolysis of the peptide shown below: H₂N. OH OH HCI H₂Oarrow_forward
- The isoelectric point of the tripeptide Gly-Ser-Ala occurs at a value below pH 7 сссс at pH 7 at a value above pH 7 neverarrow_forward3. Draw the tripeptide Alanine-Cysteine-Serine (R1 = CH3, R2 = CH2SH, R3 = CH2OH) under the following pH conditions and list the net charge on the protein. A. pH= 1 Net charge? B. pH=7 Net charge? C. pH=12 Net charge?arrow_forwardWhat is the pI for the polypeptide ALRHEN? Use pKa of 8 for the N-terminus and 4 for the C-terminus.arrow_forward
- The octapeptide angiotensin II has the sequence Asp-Arg-Val-Tyr-Ile-His-Pro- Phe. What fragments would result if angiotensin II were cleaved with trypsin? With chymotrypsin?arrow_forwardEstimate the pI of each tripeptide in Problem 27.46. Draw a structural formula of these tripeptides. Mark each peptide bond, the N-terminal amino acid, and the C-terminal amino acid. (a) Phe-Val-Asn (b) Leu-Val-Glnarrow_forwardMost amino acids have isoelectric points between 5.0 and 6.0, but the isoelectric point of lysine is 9.7. Explain why lysine has such a high value for its isoelectric point.arrow_forward
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