In biochemistry, a substrate is a molecule upon which an enzyme acts. Enzymes catalyze chemical reactions involving the substrate(s). The substrate binds with the enzyme's active site, and an enzyme-substrate complex is formed. The substrate is broken down into a product and is released from the active site. The active site is now free to accept another substrate molecule. An example of a substrate would be milk and the enzyme added would be rennin which causes milk to set. Another example would be the reaction of catalase in the decomposition of hydrogen peroxide. Look up substrate in Wiktionary, the free dictionary. ... Biochemistry is the study of the chemical processes and transformations in living organisms. ... 3D (left and center) and 2D (right) representations of the terpenoid molecule atisane. ... Ribbon diagram of the enzyme TIM, surrounded by the space-filling model of the protein. ... In chemistry and biology, catalysis is the acceleration (increase in rate) of a chemical reaction by means of a substance, called a catalyst, that is itself not consumed by the overall reaction. ... Chemical reactions are also known as chemical changes. ... The active site of an enzyme is the binding site where catalysis occurs. ... Ribbon diagram of the enzyme TIM, surrounded by the space-filling model of the protein. ... Ribbon diagram of the enzyme TIM, surrounded by the space-filling model of the protein. ... Rennet, also called rennin or chymosin (EC 3. ... Catalase (human erythrocyte catalase: PDB 1DGF, EC 1. ... “Spoilage” redirects here. ... Hydrogen peroxide (H2O2) is a very pale blue liquid which appears colourless in a dilute solution, slightly more viscous than water. ...

2 H₂O₂ → 2 H₂O + O₂.

A general equation is as follows:

E + S ⇌ ES → EP ⇌ E + P

where E = enzyme, S = substrate(s), P = product(s) Note that only the middle step is irreversible.

By increasing the substrate concentration, the rate of reaction will increase due to the increase in likelihood of enzyme-substrate complexes forming, this occurs until the enzyme becomes the limiting factor. Look up substrate in Wiktionary, the free dictionary. ... Ribbon diagram of the enzyme TIM, surrounded by the space-filling model of the protein. ... In biology, agricultural science, physiology, and ecology, a limiting factor is one that controls a process, such as organism growth or species population size or distribution. ...

See also

• Enzyme kinetics
• Enzyme assay