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QUESTION 11 A dipeptide has the composition TYR-ARG. Tyrosine is at the amino terminus and arginine is at the carboxyl terminus. Considering pKR of ARG = 12.5, pk1 of ARG = 2.17, pk2 of TYR = 9.11; determine the net charge on the dipeptide at pH 6.0. O +2 O +1

QUESTION 11 A dipeptide has the composition TYR-ARG. Tyrosine is at the amino terminus and arginine is at the carboxyl terminus. Considering pKR of ARG = 12.5, pk1 of ARG = 2.17, pk2 of TYR = 9.11; determine the net charge on the dipeptide at pH 6.0. O +2 O +1

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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QUESTION 11 A dipeptide has the composition TYR-ARG. Tyrosine is at the amino terminus and arginine is at the carboxyl terminus. Considering pKR of ARG = 12.5, pK, of ARG = 2.17, pk2 of TYR = 9.11; determine the net charge on the dipeptide at pH 6.0: O +2 0.1 QUESTION 12 Carefully analyze the structures of the peptides 1-4 and determine which of the peptide(s) will be least solunle in water? Lys Glu-Ser-Arg-Asp Peptide-2 Lys-Ser-Ala-Tyr-LysGlu-Lys-Arg-Arg-Asp Peptide-3 Phe-Leu-Ser-Ala-Ile Peptide-1 Peptide-4 O 2 and 3 O 2 and 4 O 1,2 and 4 O 1 and 2 O only 1 QUESTION 13 Titration of amino acids by a strong base, for example NaOH, results in two pks. The reaction occurring for the pk2 is correctly represented by which of the following reactions? Recall, Pka referes to titration of - NH2 + OH - –NH + H20 bmit. Click Save All Answers to save all answers. Save All Answers Clos Courses Sdent Support
Transcribed Image Text:QUESTION 11 A dipeptide has the composition TYR-ARG. Tyrosine is at the amino terminus and arginine is at the carboxyl terminus. Considering pKR of ARG = 12.5, pK, of ARG = 2.17, pk2 of TYR = 9.11; determine the net charge on the dipeptide at pH 6.0: O +2 0.1 QUESTION 12 Carefully analyze the structures of the peptides 1-4 and determine which of the peptide(s) will be least solunle in water? Lys Glu-Ser-Arg-Asp Peptide-2 Lys-Ser-Ala-Tyr-LysGlu-Lys-Arg-Arg-Asp Peptide-3 Phe-Leu-Ser-Ala-Ile Peptide-1 Peptide-4 O 2 and 3 O 2 and 4 O 1,2 and 4 O 1 and 2 O only 1 QUESTION 13 Titration of amino acids by a strong base, for example NaOH, results in two pks. The reaction occurring for the pk2 is correctly represented by which of the following reactions? Recall, Pka referes to titration of - NH2 + OH - –NH + H20 bmit. Click Save All Answers to save all answers. Save All Answers Clos Courses Sdent Support
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