Catalysis is the increase in the rate of a chemical reaction due to the participation of an additional substance called a catalysthttp://goldbook.iupac.org/C00876.html, which is not consumed in the catalyzed reaction and can continue to act repeatedly.
A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.
Enzymes are macromolecular biological catalysts.
Isomerases are a general class of enzymes that convert a molecule from one isomer to another.
This page lists enzymes by their classification in the International Union of Biochemistry and Molecular Biology's Enzyme Commission numbering system.
Products are the species formed from chemical reactions.
In chemistry, a substrate is typically the chemical species being observed in a chemical reaction, which reacts with a reagent to generate a product.