And what that means is at a certain particular PH it will begin to dissociate and give off that age. And when it dissociates it forms the depronative version of Guanine in which this age has been removed. And the two electrons in that covalent bond have now gone on to that nitrogen. And so we produce a negative charge here and a positive charge here. And this is basically equivalent to this equation here, where the H is this H here and the A is this entire molecule here and the Ha is this molecule here. But for this particular reaction the PKA is equal to 9.7.