And we want to make sure that that proteolytic enzyme does not break these disulfide bonds. So we take our protein, we expose it to our proteolytic chemical. And what that proteoly chemical does is it cleaves at different sections on these two polypeptides. For example, let's say it cleaves. Let's erase these for a moment so that we're not confused. So that proteolytic chemical, for example, let's say cleaves at this location.