So in our derivation on the Mechaless Methane equation, we basically use the following chemical equation. And this chemical equation describes when that reaction, the enzyme catalyze reaction, is in its beginning stages. So when the time is approximately equal to zero. And what this equation basically tells us is if we take the enzyme so this is the red enzyme and we add the substrate so given in blue, then what will begin to happen is some the substrate will begin to bind onto the active side to form the enzyme substrate complex. And this is our intermediate. Now, what we also said was we assumed the steady state condition and the steady state condition means that the concentration of this intermediate, the enzyme substrate complex, is not changing over time.