Question: Draw the tripeptide His-Glu-Ala, with charges, at pH 5. Identify the i) C-terminus, ii) the N-terminus, iii) a peptide bond, iv) a hydrophobic residue and v) a polar charged residue. What is the overall charge on the molecule at pH 5? pKas: C-term 3.5, N-term 9.0, His 6.0, Glu 4.1.