This group here, the PKA value is about 3.1. So we have, let's make this neater 8.03.1 and then we have to look at the side chain group. So for Glycine, this cannot lose an H atom, so it doesn't have a PK value. But these two groups can gain and lose an H atom, and it happens at a PKA value of around 4.1. So PKA for both of these is around 4.1. Now, once again, your textbook or your teacher might give you slightly different PKA values.