Organic Chemistry
9th Edition
ISBN: 9781305080485
Author: John E. McMurry
Publisher: Cengage Learning
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Textbook Question
Chapter 26.2, Problem 4P
Hemoglobin has pI=6.8. Does hemoglobin have a net negative charge or net positive charge at pH=5.3? At pH=7.3?
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Chapter 26 Solutions
Organic Chemistry
Ch. 26.1 - How many of the -amino acids shown in Table 26-1...Ch. 26.1 - Prob. 2PCh. 26.1 - Prob. 3PCh. 26.2 - Hemoglobin has pI=6.8. Does hemoglobin have a net...Ch. 26.3 - Show how you could prepare the following -amino...Ch. 26.3 - What alkyl halides would you use to prepare the...Ch. 26.3 - Prob. 7PCh. 26.4 - There are six isomeric tripeptides that contain...Ch. 26.4 - Draw the structure of M-P-V-G, and indicate its...Ch. 26.5 - Prob. 10P
Ch. 26.5 - Prob. 11PCh. 26.6 - The octapeptide angiotensin II has the sequence...Ch. 26.6 - Prob. 13PCh. 26.6 - Prob. 14PCh. 26.6 - Give the amino acid sequence of hexapeptides that...Ch. 26.7 - Prob. 16PCh. 26.7 - Write all five steps required for the synthesis of...Ch. 26.10 - Prob. 18PCh. 26.SE - Identify the following amino acids:Ch. 26.SE - Prob. 20VCCh. 26.SE - Isoleucine and threonine are the only two amino...Ch. 26.SE - Prob. 22VCCh. 26.SE - Give the sequence of the following tetrapeptide:Ch. 26.SE - Prob. 24MPCh. 26.SE - The chloromethylated polystyrene resin used for...Ch. 26.SE - Prob. 26MPCh. 26.SE - Prob. 27MPCh. 26.SE - Prob. 28MPCh. 26.SE - Except for cysteine, only S amino acids occur in...Ch. 26.SE - Prob. 30APCh. 26.SE - Prob. 31APCh. 26.SE - Show the structures of the following amino acids...Ch. 26.SE - Prob. 33APCh. 26.SE - Using both three- and one-letter codes for amino...Ch. 26.SE - Prob. 35APCh. 26.SE - Show how you could use the acetamidomalonate...Ch. 26.SE - Prob. 37APCh. 26.SE - Show how you could prepare the following amino...Ch. 26.SE - Prob. 39APCh. 26.SE - Predict the product of the reaction of valine with...Ch. 26.SE - Prob. 41APCh. 26.SE - Prob. 42APCh. 26.SE - Propose two structures for a tripeptide that gives...Ch. 26.SE - Show the steps involved in a synthesis of...Ch. 26.SE - Prob. 45APCh. 26.SE - Prob. 46APCh. 26.SE - Prob. 47APCh. 26.SE - Which of the following amino acids are more likely...Ch. 26.SE - Leuprolide is a synthetic nonapeptide used to...Ch. 26.SE - The -helical parts of myoglobin and other proteins...Ch. 26.SE - Prob. 51APCh. 26.SE - Cytochrome c is an enzyme found in the cells of...Ch. 26.SE - Prob. 53APCh. 26.SE - Prob. 54APCh. 26.SE - Prob. 55APCh. 26.SE - What is the structure of a nonapeptide that gives...Ch. 26.SE - Oxytocin, a nonapeptide hormone secreted by the...Ch. 26.SE - Aspartame, a nonnutritive sweetener marketed under...Ch. 26.SE - Prob. 59APCh. 26.SE - Prob. 60APCh. 26.SE - Prob. 61APCh. 26.SE - Prob. 62AP
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- If an amino acid has pKa1 = 2.71 and pKa2 = 9.31, at what pH value in aqueous solution would the predominant form of this amino acid be a zwitterion? Please explain your answer and show your work. a) 6.01 b) 2.71 c) 5.65 d) 12.02 e) 9.31arrow_forwardA protein has minimum solubility dissolved in a solution of 2.0 mL of water, 7.0 mL of 0.2 M sodium acetate and 1.0 mL of 0.5 M acetic acid. Estimate the pI of the protein.arrow_forward(In great detail) Valine (HV) is a diprotic amino acid with ?a1=5.18×10−3 and ?a2=1.91×10−10. Determine the pH of each of the solutions. A 0.303 M valine hydrochloride (H2V+Cl−) solution ph = ? A 0.303 M valine (HV) solution. ph = ? A 0.303 M sodium valinate (Na+V−) solution. ph = ?arrow_forward
- Activity 1 Strengtg of IMFA qnd Physical Properties of Covalent Compoundsarrow_forwardDetermine the net charge of the predominant form of Asp at (a) pH 1.0, (b) pH 3.0.arrow_forwardA solution with 5 mg/mL of a colored protein has an absorbance of 0.250. What is the concentration of a sample of that protein whose absorbance is 0.90?arrow_forward
- An alpha-helix transmembrane protein has 35 arnino acid residues embedded in a lipid bilayer membrane. What is the thickness of the biological membrane? O 467 AẢ O525À O 126Aarrow_forwardDescribe three effects of pH on ionization of a weak acid or base that impact biological stability of a protein.arrow_forwardGiven that the solubility reaction for calcium phosphate is Ca3(PO4)2(s)⇌3Ca2+(aq)+2PO43−(aq)Ca3(PO4)(s)⇌3Ca2+(aq)+2PO43−(aq) why does the addition of acid increase the solubility of calcium phosphate?arrow_forward
- Given that C6H11COOH has a pKa = 4.8 and C6H11N + H3 has a pKa = 10.7, what pH would you make the water layer to cause both compounds to dissolve in it?arrow_forward22-59 What is the effect of salt bridges on the tertiary structure of proteins?arrow_forwardDraw the lewis structures of the following: alanine, asparagine, cysteine, glutamine, glycine, isoleucine, leucine, methionine, phenylalanine, proline, serine, threonine, tryptophan, tyrosine, and valine. At a pH of 7.4. (May you check if those are the correct amino acid found in living cells)arrow_forward
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