a molecule that is essential for the activity of some enzymes; it may exist free in solution within a living organism, but functions by binding to an enzyme to assist in catalyzing a reaction. The molecule itself may be temporarily changed during the reaction, but is ultimately restored to its original form. Many vitamins function as coenzymes.
a organic molecule cofactor for an enzyme. See enzymes.
A compound that regulates activity by binding to an enzyme to tell it when to catalyze a reaction.
Srnall molecule tightly associated with an enzyme that participates in the reaction that the enzyme catalyzes, often by forming a transient covalent bond to the substrate. Examples include biotin, NAD+, and coenzyme A.
A non-protein compound that is the active form of an enzyme unit
A component of an enzyme system that facilitates the working of the enzyme.
A type of accessory molecule that participates at the active site of an enzyme and allows it to function. Many vitamins are important coenzymes.
A substance needed by enzymes to produce many of the reactions in energy and protein metabolism in the body.
A small molecule associated with an enzyme that participates in enzymatic catalysis.
A heat stable molecule that must be loosely associated with an enzyme for the enzyme to perform it's function.
An organic molecule (but not a protein) that is a necessary participant in an enzyme reaction.
(ko-èn¹zìm´), any of a group of relatively small organic molecules that make up the non-protein portion of an ENZYME and without which the enzyme is inactiv e. Coenzymes participate in chemical reactions catalyzed by enzymes; although often structurally altered in the course of the reaction, coenzymes are always restored to their original form. Notable coenzymes include ADENOSINE TRIPHOSPHATE, important in the transfer of chemical energy, and VITAMINS, vital to a variety of biochemical reactions in the body, including the Krebs cycle (see CITRIC ACID CYCLE
A molecule that is associated with an enzyme, and necessary for it to function, but that is itself without catalytic activity.
molecule or ion that assists an enzyme in performing its function.
a small molecule (not a protein but sometimes a vitamin) essential for the activity of some enzymes
a dissociable, low-molecular weight, non-proteinaceous organic compound (often nucleotide ) participating in enzymatic reactions as acceptor or donor of chemical groups or electrons
a molecule which is essential for, but consumed in the catalyzed reaction
a non-amino acid "plugin" most enzymes use to do their actual work
an organic An organic compound is any of a large class of chemical compounds whose molecules contain carbon, with exception of carbides, carbonates and carbon oxides
an organic molecule, usually containing phosphorus and some vitamins
a particular co-factor this is necessary on behalf of enzymatic activity
a small molecule that, by itself, does not catalyze a reaction
a small organic molecule that binds to an enzyme and is required for its catalytic activity
a substance needed for proper functioning of an enzyme, a protein that speeds up the rate at which chemical reactions take place in the body
a substance that facilitates or is necessary for the action of an enzyme
the major portion, though nonprotein, part of an enzyme; usually a B vitamin.
A low-molecular-weight chemical which participates in an enzymatic reaction by accepting and donating electrons or functional groups. Examples: NAD+, FAD.
a necessary non-protein component of an enzyme; usually a vitamin or mineral
A substance that acts in concert with enzymes to speed up chemical reactions in the body.
coe-EN-zime An organic cofactor necessary for the function of certain enzymes. 119
A substance that enhances or is necessary for the action of enzymes. They are generally much smaller than enzymes themselves.
A molecule that works with an enzyme to enable the enzyme to perform its function in the body; essential in the utilization of vitamins and minerals.
A heat stable molecule that must be associated with another enzyme for the enzyme to perform its function in the body. It is necessary in the utilization of vitamins and minerals.
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 holoenzyme.
co, together + Gk. en, in + zyme, leaven] An organic molecule serving as a cofactor. Most vitamins function as coenzymes in important metabolic reactions.
Is a substance which works with an enzyme to promote the enzymes action. Many coenzymes have vitamins as part of their structures.
A substance that works with an enzyme to promote the enzyme's activity.
an organic molecule that acts as an emzyme cofactor
A molecule that works with an enzyme to perform its function in the body. Coenzymes are necessary in the utilization of vitamins and minerals.
a molecule that binds to an enzyme and is essential for its activity, but is not permanently altered by the reaction. Many coenzymes are derived from vitamins.
A molecule required for the activity of another enzyme.
An enzyme cofactor.
an activator of an enzyme; many vitamins are coenzymes.
A Non protein organic molecule that functions along with an enzyme to either activate or deactivate the enzyme. Organic cofactors.
An organic nonprotein molecule that does not bind the enzyme, but is required for the enzyme's function by acting as an intermediate carrier of electrons, atoms, or groups of atoms.
Coenzymes are small organic non-protein molecules that carry chemical groups between enzymes. Many coenzymes are phosphorylated water-soluble vitamins. However, nonvitamins may also be coenzymes, such as ATP, the biochemical carrier of phosphate groups, or coenzyme A the coenzyme that carries acyl groups.