And for this particular alpha carboxyl group, let's say it's 3.1 at that same temperature condition. So in this particular case, all we have to do to find the pi value of this amino acid is simply take the sum of these, divide by two and we get the average. So we have eight plus 3.1, which is 11.1. We divide that by two, we get 5.55. So the pi value for glycine is 5.55, assuming these are our PKA values. Now these PKA values might change if we change the conditions under which this amino acid is in.