So if we're below a PH of the PKA, so let's say in this particular case, if we're below a PH of 3.1, then the acid form of the molecule will predominate. But if we're above a PH of 3.1, then what that means is this conjugate base form will predominate. And that's exactly why at a normal physiological PH of around seven, every single one of our amino acid contains an alpha called a carboxyl group that exists in the carboxylate ion form, because the PH of seven is above a PH of three is above the PH of 3.1. Now, what about the alpha amino group? Well, the Alpha amino group contains a PKA of 8.0. And what that means is, because our normal physiological PH is seven, and because a PH of seven is below a PH of eight, what that means is every single one of our amino acids at the normal physiological PH will contain an alpha amino group that will predominate in this form because it is below a PH of eight.