Abstract
1. The reaction L-ascorbic acid→D-dehydroascorbic acid by adapted and unadapted cells is catalyzed by different enzymes, i.e.. by L-ascorbic acid oxidase in the former and L-ascorbic acid dehydrogenase in the latter.
2. The adaptive enzyme system in L-ascobic acid-adapted cells was inactivated by standing without the substrate, but is reactivated by adding L-ascorbic acid.
3. The relationship between the chemical structure of L-ascorbic acid and its degradation by the cells was investigated.
