So now, instead of summing this and dividing by two, we summon this, divide that by two. So we get 10.8 plus eight. That's 18.8. Divided by two gives us 9.4. So the pi, the isoelectric point for this amino acid, which is basically Lysine, is equal to 9.8. So at a PH of 9.8, these two charges will exactly cancel out this negative charge that is found on the alpha carboxyl group.