Neutral lysine can be written HL. The other forms of lysine are H 3 L 2+ ,

Question:

Neutral lysine can be written HL. The other forms of lysine are H₃L²⁺, H₂L⁺, and L⁺. The isoelectric point is the pH at which the average charge of lysine is 0. Therefore, at the isoelectric point, 2[H₃L²⁺] + [H₂L⁺] = [L⁺]. Use this condition to calculate the isoelectric pH of lysine.