Enzymes lower the activation energy necessary to transform a reactant into a product. On the left is a reaction that is not catalyzed by an enzyme (red), and on the right is one that is (green).

Cells constantly adjust the flow of molecules through metabolic pathways in response to energy needs. Learn how enzymes control these molecular transformations.

Enzymes are biological catalysts that lower the activation energy of chemical reactions, allowing them to proceed at a faster rate. This illustration depicts the process of enzyme catalysis. The ...

The activation energy barrier separates reactants from products. The top of the barrier is the transition state. Putting the right amount of energy into the reaction allows the reactants to surmount ...

This orientates the reactants into the correct positions for the reaction to take place. The binding of the enzyme to its substrate also lowers the activation energy of the reaction (amount of ...

Proton-coupled electron transfer (PCET) reactions play ... Studies of the enzyme soybean lipoxygenase provide a physical explanation for the experimental observation of unusually high kinetic isotope ...