And the Makalis constant is actually a very important constant, as we'll see in the next lecture. And the units of Michael's constant are concentration. So we'll talk much more about this in the next lecture and let's designate this as equation number four. Now, if we take this new equation, this is equal to this and rearrange it and solve it for the concentration of the enzyme substrate complex, we get equation five. So we essentially bring this to this side and we bring this to our denominator here, and we get equation five. So the concentration Es is equal to E multiplied by S divided by Km.