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Question: question 1 you have been given a peptide containing a...

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QUESTION 1 You have been given a peptide containing a single Glu, His and Lys residue and no other amino acids with ionizable side chains. Both the N- and C-termini are blocked (they do not carry a charge). Using the titration curves for each of the three ionizable groups below, determine the following The pH at which the His imidazole and Glu Y-carboxyl are each about 90% ionized. The pH at which the peptide is nearest its isoelectric point. The pH at which the Lys ε-amino group is nearest its pKa. The pH at which the fewest protons are dissociated from the peptide. His imidazole Glu y-carboxyl 013 DA 05 0 O 09
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