### Michaelis-Menten

Michaelis-Menten is a kinetic model
that accurately predicts the kinetic behavior of many enzymes. A common way
of writing the Michaelis-Menten form is to state it as the velocity (v), where
.

This is the kinetic model for an
irreversible reaction with one substrate where the product has no influence
on the rate of the reaction.

When the substrate concentration
is much less than the Km value (the concentration at which the velocity is equivalent
to half the maximal velocity), we can in three steps re- write the Michaelis-Menten
as mass action kinetics.

where

When the concentration of S is much
greater than Km, the observed velocity is equal to the maximum velocity.