Competitive

Competitive inhibitors have a molecule shape similar to that of the substrate, allowing them to occupy the active site. They can compete with substrate for the active site, and can therefore stop the enzyme – substrate complex forming. If the substrate concentration is increased, the effect of the inhibitor is reduced. The inhibitor is not permanently bound to the active site (in reversible inhibitors), and so, when it leaves the enzyme, a substrate can take its place. In other words, reversible inhibitors are…