An organic nonprotein molecule, frequently a phosphorylated derivative of a water-soluble vitamin, that binds with the protein molecule (apoenzyme) to form the active enzyme (holoenzyme).
A nonprotein compound that functions to activate an enzyme.
Organic compounds required for the activity of some enzymes; most are derived from vitamins.
A nonprotein substance derived from, a vitamin that activates an enzyme.
A nonproteinaceous organic molecule required for the action of certain enzymes. The coenzyme contains as part of its structure one of the vitamins. This is why vitamins are so critically important to living organisms. Sometimes the same coenzyme is required by different enzymes that are involved in the catalysis of different reactions. By analogy, a coenzyme is like a part of a car such as a tire which can be identified in and of itself and which can, furthermore, be removed from the car. The car (enzyme), however, must of necessity have the tire in order to carry out its prescribed function. Coenzymes have been classified into two large groups: fat soluble and water soluble. Examples of a few water-soluble vitamins are: thiamin, biotin, folic acid, vitamin C, and vitamin B12. Examples of fat-soluble vitamins are: vitamins A, D, E, and K.
As assistant, or helper, usually a vitamin or mineral, which is necessary for the enzyme to do its work.
A small organic molecule, usually a vitamin, that is required for the catalytic activity of an enzyme.
The term coenzyme refers to a molecule that is required by an enzyme for function but does not participate directly in the reaction catalyzed by the enzyme. Some coenzyme molecules can participate with more than one enzyme.
Nonprotein substance (sometimes a vitamin) that functions to aid the action of an enzyme.
A nonprotein organic compound that, in the presence of an enzyme, plays an essential role in the reaction that is catalyzed by the enzyme. Coenzymes, which frequently contain the B vitamins in their molecular structure, include coenzyme A, FAD, and NAD.
An enzyme activator; a diffusible, heat-stable substance of low molecular weight that, when combined with an inactive protein called apoenzyme, forms an active compound or a complete enzyme called a holoenzyme (e.g., adenylic acid, riboflavin, and coenzymes I and II).
Substances necessary for the action of any enzyme; many vitamins are coenzymes.
Enzyme action is not solely reliant on protein substances, as non-protein entities like ions and smaller organic molecules also play a significant role in facilitating the process. These non-protein compounds can bind to enzymes, activating or deactivating them as required for optimal performance.
Termed as a cofactor or coenzyme, a diminutive nonprotein molecule that binds to an enzyme, instigating the facilitation of enzyme-catalyzed reactions.
Referred to as a cofactor or coenzyme, this is a compact nonprotein molecule that attaches to an enzyme, triggering the acceleration of enzyme-driven reactions.
A nonprotein substance that naturally occurs in the body, this chemical contributes to the facilitation of proper functioning for certain types of enzymes. Enzymes are proteins that regulate chemical reactions within the body.