And so we'll have a negative charge will exist in the form as shown on the board. And now what we have to do to find the net charge is we sum up all the charges. So we have a positive one, negative one, those cancel out, and then we have negative one and negative one. So we see that the net charge on the protein is negative two. And what that means is our estimate, our guess, was incorrect. At a PH of seven, this protein will have a charge of negative two.