Km is also constant. It depends on these three rate constants of the three equations that we described a moment ago. And this S is simply the x value on the following coordinate plane. So the x is simply the concentration of the S. And this is exactly what we basically want to derive in the first place. This equation is known as the Michael's mental equation. And the Mcales Mental equation is basically used in enzyme kinetics to study the rates at which enzymes actually operate and act on different types of biological reactions.