EBK ORGANIC CHEMISTRY
8th Edition
ISBN: 8220102744127
Author: Bruice
Publisher: PEARSON
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Textbook Question
Chapter 21, Problem 72P
A mixture of 15 amino acids gave the fingerprint shown here (see Problem 58). Identify the spots. (Hint 1: Pro reacts with ninhydrin to produce a yellow color: Phe and Tyr produce a green color. Hint 2: Count the number of spots before you start.)
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Your task is to categorize and tabulate the 20 standard
amino acids with the following columns:
1. Amino Acid Full Name (alphabetical order)
2. One letter abbreviation
3. Three-letter abbreviation
4. Structure of R-group (if you will present the full
picture of the amino acid, encircle or highlight the R
group)
5. Classification (1, 2, 3 or 4)
6. Essential or Non-Essential Amino Acid (research on
this; write E for Essential & NE for Non-Essential)
7. Use/ Function of Amino Acid
Pls help ASAP on both questions I HUMBLY REQUEST
Consider the tripeptide phenylalanylcysteylmethionine.
Part: 0/2
Part 1 of 2
Draw the structure of this tripeptide at physiological pH.
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Chapter 21 Solutions
EBK ORGANIC CHEMISTRY
Ch. 21.1 - a. Explain why, when the imidazole ring of...Ch. 21.2 - a. Which isomer(R)-alanine or (S)-alanineis...Ch. 21.2 - Prob. 4PCh. 21.3 - Prob. 5PCh. 21.3 - Prob. 6PCh. 21.3 - Draw the predominant form for glutamate in a...Ch. 21.3 - a. Why is the pKa of the glutamate side chain...Ch. 21.4 - Calculate the pI of each of the following amino...Ch. 21.4 - a. Which amino acid has the lowest pI value? b....Ch. 21.4 - Prob. 12P
Ch. 21.4 - Prob. 13PCh. 21.4 - Explain why the pI of lysine is the average of the...Ch. 21.5 - What aldehyde is formed when valine is treated...Ch. 21.5 - Prob. 16PCh. 21.5 - Prob. 17PCh. 21.5 - Prob. 18PCh. 21.5 - Prob. 19PCh. 21.6 - Why is excess ammonia used in the preceding...Ch. 21.6 - Prob. 21PCh. 21.6 - What amino acid is formed using the...Ch. 21.6 - Prob. 23PCh. 21.6 - What amino acid is formed when the aldehyde used...Ch. 21.7 - Esterase is an enzyme that catalyzes the...Ch. 21.8 - Draw the tetrapeptide Ala-Thr-Asp-Asn and indicate...Ch. 21.8 - Draw the resonance contributors of the peptide...Ch. 21.8 - Which bonds in the backbone of a peptide can...Ch. 21.9 - An opioid pentapeptide has the following...Ch. 21.9 - What is the configuration about each of the...Ch. 21.9 - Glutathione is a tripeptide whose function is to...Ch. 21.10 - What dipeptides would be formed by heating a...Ch. 21.10 - Suppose you are trying to synthesize the dipeptide...Ch. 21.10 - Show the steps in the synthesis of the...Ch. 21.10 - a. Calculate the overall yield of bradykinin when...Ch. 21.11 - Show the steps in the synthesis of the...Ch. 21.13 - Prob. 37PCh. 21.13 - In determining the primary structure of insulin,...Ch. 21.13 - A decapeptide undergoes partial hydrolysis to give...Ch. 21.13 - Explain why cyanogen bromide does not cleave on...Ch. 21.13 - Indicate the peptides produced from cleavage by...Ch. 21.14 - Prob. 43PCh. 21.14 - Three peptides were obtained from a trypsin...Ch. 21.14 - Prob. 45PCh. 21.15 - How would a protein that resides in the nonpolar...Ch. 21.16 - a. Which would have the greatest percentage of...Ch. 21.17 - When apples that have been cut are exposed to...Ch. 21 - Glycine has pK2 values of 2.34 and 9.60. At what...Ch. 21 - Prob. 50PCh. 21 - A titration curve is a plot of the pH of a...Ch. 21 - Prob. 52PCh. 21 - Aspartame (its structure is on page 1007) has a pl...Ch. 21 - Draw the form of aspartate that predominates at...Ch. 21 - Show how phenylalanine can be prepared by...Ch. 21 - A professor was preparing a manuscript for...Ch. 21 - What aldehydes are formed when the following amino...Ch. 21 - Prob. 58PCh. 21 - Determine the amino acid sequence of a polypeptide...Ch. 21 - Prob. 60PCh. 21 - Prob. 61PCh. 21 - Which is the more effective buffer at...Ch. 21 - Identify the location and type of charge on the...Ch. 21 - Draw the product obtained when a lysine side chain...Ch. 21 - After the polypeptide shown below was treated with...Ch. 21 - Treatment of a polypeptide with 2-mercaptoethanol...Ch. 21 - Show how aspartame can be synthesized using DCCD.Ch. 21 - -Amino acids can be prepared by treating an...Ch. 21 - Reaction of a polypeptide with carboxypeptidase A...Ch. 21 - a. How many different octapeptides can be made...Ch. 21 - Glycine has pKa values of 2.3 and 9.6. Do you...Ch. 21 - A mixture of 15 amino acids gave the fingerprint...Ch. 21 - Write the mechanism for the reaction of an amino...Ch. 21 - Prob. 74PCh. 21 - Show how valine can be prepared by a. a...Ch. 21 - The primary structure of -endorphin, a peptide...Ch. 21 - A chemist wanted to test his hypothesis that the...Ch. 21 - Propose a mechanism for the rearrangement of the...Ch. 21 - A normal polypeptide and a mutant of the...Ch. 21 - Determine the amino acid sequence of a polypeptide...
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- The above amino acid, shown at pH = 7.0 and where every atom (including hydrogens!) is visible, is (D or L) -X-arrow_forwardThis amino acid would be more likely to bind to a receptor inside of the cell. COO- H3N-C-H CH2 CH2 CH2 CH2 *NH3 True O False This amino acid would be more likely to bind to a receptor inside of the cell. COO H3N-C-H H-C-CH3 CH2 CH3 O True O Falsearrow_forwardPlz answer correctly asaparrow_forward
- fill in the boxesarrow_forwardof 25 > © Macmillan Learning Match each structure and description to the appropriate amino acid. لا Glycine Resources Solution Penalized Hint Submit Answ Histidine Isoleucine Answer Bank H NH₁* H-C=C C-C-COO R group partially protonated at physiological pH one chiral center smallest R group N NH H H CII H NH₁₂+ H-C-COO two chiral centers no chiral centers E CH HHH NH¸* H-C-C-C-C-COO | | HH CH, H X Attemp zoomarrow_forwardd) 1.EtMgBr PCC HO- CH2CI2 2. H20 Aarrow_forward
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