1. a. For the following two peptides, draw the chemical structure of both peptides, indicating where the peptide bonds are.
(1a) Pro-Lys-Phe-Asp (ii) His-Tyr-Arg-Trp
1b. Draw a titration curve for both of these peptides. Be sure to label the axes properly, indicate the pKa values, the equivalence points and the buffering regions.