It appears to be due, in large part, to the activity of a specific enzyme , cytokinin oxidase.
In addition, steroid hormones are known to impair enzymic antioxidant defenses and directly induce oxidative stress.
For enzymic catalysis, this source of reversible work is unlikely because the amount of work required is much greater, while the participants in the reaction, including the enzyme, are usually chemically unreactive.
The enzymic pathways shown will not necessarily all be present in a particular cell.
They can act as real enzymes and, by analogy to protein enzymes , are called ribozymes.
Consequently, we examined the interaction between the two proteins in extracts without enzymatically digesting the cellular DNA.
Nevertheless, it is known that fish peroxisomes have enzymatic systems similar to those reported in mammals.
During blood clotting, two peptide fragments are removed enzymatically from fibrinogen in the formation of fibrin, the blood-clotting protein.
This effect was independent of the enzymatic activity of this protein.
Among these anaerobic proteins are enzymes involved in glycolysis and related processes.