THIS IS A BIOCHEMISTRY QUESTION:

Two residues in the invertase active site, Asp-23 and Glu-204 play a critical role in hydrolysis of sucrose into glucose and fructose. The side chain of Asp-23 has a pKa of 3.7 and the side chain of Glu-204 has a pKa of 6.2. Draw the side chains of Asp-23 and Glu-204 at pH 5 and pH 9.