1. a. For the following two peptides, draw the chemical structure of both peptides,indicating where the peptide bonds are.
(i) Pro-Lys-Phe-Asp (ii) His-Tyr-Arg-Trp
b. Draw a titration curve for both of these peptides. Be sure to label the axesproperly, indicate the pKa values, the equivalence points and the bufferingregions.
c. What is the pI value of the peptides. Show how you determine your answer.