Well, it turns out, in various acidic solutions, if the PH of our solution is, let's say, one, then because we have so many H ions in our solution, this here will be protonated. And so our amino acid will exist in the following form. It will have an overall charge of positive one. This is called the positively charged amino acid species. So at a PH, at a very acidic PH of around one, this amino acid, and in general, amino acids, exist in their positively charged species form. Now, as we begin to increase our PH, we decrease the concentration of the H plus ions inside our solution.