If we go below a PH of 10.8, this group will predominate. If we go above a PH of 10.8, this is the group that will predominate. And the same thing is true for the other five readily ionizable amino acids. Now, since proteins consist of different combinations of these readily ionizable amino acids, what that means is they will have different net charge values at some specific PH value. For example, they will have different net charges at the physiological PH of around seven. Now, what it also means is that every protein will have a unique PH value at which the overall net charge on that protein, on that polypeptide, will be zero.