Which will increase the solubility of the zwitterion of lysine in water?

• A. Buffering the water solution to a pH equal to the isoelectronic point.
• B. Buffering the water solution to a pH less than the isoelectronic point.
• C. Buffering the water solution to a pH greater than the isoelectronic point.
• D. Both B and C

Answer: (A)