Draw the following peptides, AND indicating the amide bonds that are formed through the side chains. What are the pKa values of the various groups on the peptide?
1a. y-Glu-Cys-Gly (y-Glu indicates that the side chain is used for the bond to Cys)
1b.Leu-Pro-ε-Lys (ε-Lys indicates that the Lys side chain is used in the bond linking Pro and Lys)