Noun
(biology) any agency bringing about activation; a molecule that increases the activity of an enzyme or a protein that increases the production of a gene product in DNA transcription
Source: WordNetAn example of this in cell biology is that activated CDK1 (Cyclin Dependent Kinase 1) activates its activator Cdc25 while at the same time inactivating its inactivator, Wee1, thus allowing for progression of a cell into mitosis. Source: Internet
Aspartate carbamoyltransferase also ensures that just the right amount of pyrimidine nucleotides is available, as activator and inhibitor molecules attach to aspartate carbamoyltransferase to speed it up and to slow it down. Source: Internet
Fructose 2,6-bisphosphate (F2,6BP) is a very potent activator of phosphofructokinase (PFK-1) that is synthesized when F6P is phosphorylated by a second phosphofructokinase ( PFK2 ). Source: Internet
Divalent europium (Eu 2+ ) in small amounts is the activator of the bright blue fluorescence of some samples of the mineral fluorite (CaF 2 ). Source: Internet
In some cases, the concentration of the activator must be restricted to below a certain level, to prevent quenching of the fluorescent emission. Source: Internet
Supersulfated cements contain about 80% ground granulated blast furnace slag, 15% gypsum or anhydrite and a little Portland clinker or lime as an activator. Source: Internet