Essential Organic Chemistry (3rd Edition)
3rd Edition
ISBN: 9780321937711
Author: Paula Yurkanis Bruice
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 17, Problem 36P
A professor was preparing a manuscript for publication in which she reported that the pI of the tripeptide Lys-Lys-Lys was 10.6. One of her students pointed out that there must be an error in her calculations because the pKa of the side-chain amino group of lysine is 10.8 and the pI of the tripeptide has to be greater than any of its individual pKa values. Was the student correct?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Please correct answer and don't used hand raiting
hello, this is about physical chemistry . can you help me please?
PROBLEM 5+
What is the major product of each of the following reactions?
a. CH3CH2CHCH3 + HBr
d.
+ HBr
A
OH
OH
CH3
CH3
e.
b.
-OH + HCI
+ HCl
A,
OH
CH3
OH
CH3
c. CH3C CHCH3 + HBr
CH3 OH
f.
CHCH3 + HCl ^>
Chapter 17 Solutions
Essential Organic Chemistry (3rd 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...
Knowledge Booster
Learn more about
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
- One suggestion for solving the fuel shortage due to decreasing volumes of fossil fuels are hydrogen / oxygen fuel cells. a. State the two half-cell reaction equations for such fuel cells. Calculate the cell potential as well as the electrical work gained by this fuel cell at standard conditions with E002/H20 = 1.229 V. b. Compare the fuel cell to the Gibbs free energy of the combustion reaction of n-octane at standard conditions. Use ASºm, n-Oct., 1 = 361.2 J/mol K.arrow_forwarda. Determine the electrochemical potential of the following cell using E°Mg2+/Mg = -2.362 V. Mg | Mg2+ (a=104) || H* (a = 4) | H2 (p = 0.5 bar) | Pt b. A galvanic chain consists of Co²+ / Co and Ag+ / Ag half-cells with EºCo²+/Co = -0.282 V and Eº Ag+/Ag = 0.799 V. Determine which half-cell will be reduced and which one will be oxidised. Furthermore, calculate the electrochemical potential as well as the equilibrium constant of the whole cell at i. [Co²+] = 0.1 M and [Ag+] = 0.5 M ii. [Co²+] = 0.001 M and [Ag*] = 1.5 Marrow_forwardThe equilibrium voltage of the following cell has been measured at 0.522 V at 25 °C. Pt | H2, g❘ HClaq || AgClaq | Ags State the redox reactions present in this cell. Calculate the pH value of the electrolyte solution with KL, AgCl = 1.96 · 10-10 mol² / L². Assume that the concentrations of H+ and Clare equal.arrow_forward
- Here are the energies (in kcal/mol) for staggered and eclipsed interactions for CH, CC, and CBr bonds eclipsed (0°) staggered (60°) bonds CH/CH 1.0 0.0 CH/CC 1.3 0.0 Br: CC/CC 3.0 0.9 Br CH/CBr 1.8 0.0 CC / CBr 3.3 1.0 CBr / CBr 3.7 1.2 a) I've drawn the Newman projection for one of the staggered conformations of the molecule above, looking down the C2-C3 bond. Draw Newman projections for the other two staggered and the three eclipsed conformations (in order). CH₂ H3C. H' H Br b) Calculate the relative energies for each of the conformations and write them below each conformation.arrow_forward90. Draw the stereoisomers obtained from each of the following reactions: a. H₂ b. H₂ C. H₂ Pd/C Pd/C Pd/Carrow_forward36. The emission spectrum below for a one-electron (hydrogen-like) species in the gas phase shows all the lines, before they merge together, resulting from transitions to the first excited state from higher energy states. Line A has a wavelength of 434 nm. BA Increasing wavelength, λ (a) What are the upper and lower principal quantum numbers corresponding to the lines labeled A and B? (b) Identify the one-electron species that exhibits the spectrum.arrow_forward
- f) The unusual molecule [2.2.2] propellane is pictured. 1) Given the bond length and bond angles in the image, what hybridization scheme best describes the carbons marked by the askerisks? 2) What types of orbitals are used in the bond between the two carbons marked by the askerisks? 3) How does this bond compare to an ordinary carbon-carbon bond (which is usually 1.54 Å long)? H₂C H₂C CH2 1.60Å ハ C. * CH₂ H₂C * C H₂ 120°arrow_forwardQuestion Resonance Forms a) Draw all resonance forms of the molecules. Include curved arrow notation. Label major resonance contributor Resonance Forms a) Draw all resonance forms of the molecules. Include curved arrow notation. Label major resonance contributorarrow_forwardCan you show me or determine the longest carbon chain, which is octane? Potentially highlight it in different sections to show me, plz, or individually?arrow_forward
- PLEASE ANSWER ALL PARTS!!arrow_forwardd) Determine the formal charge on the nitrogen atom in each of the structures. NH3 NH2 N C бобкат : N N H H Н H2N-OH A B C D E F Garrow_forwardLewis Structure, Hybridization & Molecular Geometry a) Draw the Lewis Structure of the molecules; Label the hybridization of each carbon atom; Predict the approximate molecular geometry around each carbon atom. CH3CHO CH3CN b) Draw the Lewis Structure of Nitromethane; Predict the approximate molecular geometry around the nitrogen atom. CH3NO2 c) Draw the Lewis Structure; Label the hybridization of the boron atom; Predict the approximate molecular geometry. BF3 BF4arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Introduction to General, Organic and BiochemistryChemistryISBN:9781285869759Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar TorresPublisher:Cengage Learning
Chemistry: Principles and ReactionsChemistryISBN:9781305079373Author:William L. Masterton, Cecile N. HurleyPublisher:Cengage Learning
Organic ChemistryChemistryISBN:9781305580350Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. FootePublisher:Cengage Learning
Introduction to General, Organic and Biochemistry
Chemistry
ISBN:9781285869759
Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres
Publisher:Cengage Learning
Chemistry: Principles and Reactions
Chemistry
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:Cengage Learning
Organic Chemistry
Chemistry
ISBN:9781305580350
Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Publisher:Cengage Learning
Nucleic acids - DNA and RNA structure; Author: MEDSimplified;https://www.youtube.com/watch?v=0lZRAShqft0;License: Standard YouTube License, CC-BY