# Question: 1a draw the structure for the polypeptide serthrgluleu at ph...

###### Question details

1a) Draw the structure for the polypeptide SerThrGluLeu at pH 7.

b) How many titratable protons are there in this peptide?

c) What is the total charge in the polypeptide at each successive pH interval starting at pH 0.8 as the polypeptide is deprotonated. A Table of pKa values is on the back page.

d) Draw the titration curve for this polypeptide starting with the completely protonated form.

e) What is the pI value for this polypeptide? Show your calculation.

Please show all work Thanks.