Article | REF: BIO590 V1

Enzymatic catalysis

Authors: Didier COMBES, Pierre MONSAN

Publication date: November 10, 2009, Review date: February 16, 2023

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2. Homogeneous kinetics

2.1 Michaelis-Menten equation

The Henri equation behind the Michaelis-Menten rate equation is based on the observation that the initial rate of a reaction is directly proportional to the concentration of the enzyme preparation, but increases non-linearly with substrate concentration, up to a maximum limiting rate. Henri's equation is based on the following assumptions:

  • the enzyme is a catalyst;

  • the enzyme and substrate react rapidly to form an enzyme-substrate complex;

  • a single substrate and a single enzyme-substrate complex are involved, and the enzyme-substrate complex breaks down to give the free enzyme and the product directly;

  • the...

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Homogeneous kinetics