And what that means is our net charge is in fact zero. So this is the correct guess, the correct estimate. And now we can move on to step two. Step two tells us to take this PH value and to find the PKA right above it, right below it, sum them up, divide them by two and find the average. So the PKA value right above this PH is basically 4.1. The PK value right below it is 3.1.