So we sum this with this and that gives us the rate at which our enzyme substrate complex actually breaks down. So before we actually continue now, we have to make an important assumption. And the assumption that we make is that our reaction is at a steady state condition. And what a steady state condition actually means, the intermediate that is involved in our reaction, the concentration of the intermediate, is not changing. And the only intermediate we have in our reaction is the enzyme substrate intermediate. So what that means is the concentration of the enzyme substrate complex is not changing.