2. Draw the structure of the peptide DTLH, showing the backbone and side-chain atoms in the ionization states favored at pH = 7.0. a. Draw a water molecule making a hydrogen bond to a side-chain H- bond donor. b. Draw a water molecule making a hydrogen bond to a main-chain H- bond acceptor. c. Using the values of pKs given in Table 5.1, calculate the pl for DTLH.

Fig: 1