Question

4. (12 points) a) Draw the structure at pH 7 for the following peptides. b) Determine the net charge of the peptide at pH 7, 2, and 13 for each peptide (use amino acid pKs from the textbook). c) Calculate the pl for each peptide. Show your work. Peptide 1: Cys - Phe - Tyr - Leu a) b) Net charge at pH 7 = __ at pH 2 = at pH 13 _ c) pl = ___

          4. (12 points) a) Draw the structure at pH 7 for the following peptides.
b) Determine the net charge of the peptide at pH 7, 2, and 13 for each peptide (use
amino acid pKs from the textbook).
c) Calculate the pl for each peptide. Show your work.
Peptide 1:
Cys - Phe - Tyr - Leu
a)
b) Net charge at pH 7 = ____ at pH 2 = ____ at pH 13 _____
c) pl = _____

4. (12 points) a) Draw the structure at pH 7 for the following peptides.
b) Determine the net charge of the peptide at pH 7, 2, and 13 for each peptide (use
amino acid pKs from the textbook).
c) Calculate the pl for each peptide. Show your work.
Peptide 1:
Cys - Phe - Tyr - Leu
a)
b) Net charge at pH 7 = at pH 2 = at pH 13
c) pl =

Added by Travis N.

Chemistry: Structure and Properties

Nivaldo Tro 2nd Edition

Instant Answer

Solved by Expert Shubham Kanungo

Step 1

a) The structure of the peptide Cys-Phe-Tyr-Leu at pH 7 would be as follows: Cys (Cysteine) - CH2-SH Phe (Phenylalanine) - Benzyl Tyr (Tyrosine) - Benzyl-OH Leu (Leucine) - CH2-CH-(CH3)2 Show more…

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Thanks for your feedback!

a) Draw the structure at pH 7 for the following peptides. b) Determine the net charge of the peptide at pH 7, 2, and 13 for each peptide (use amino acid pKs from the textbook): c) Calculate the pI for each peptide. Show your work. Peptide 1: Cys - Phe - Tyr - Leu b) Net charge at pH 7 = at pH 2 = at pH 13 = c) pI