Abstract
The submerged cultiva-tion increased the contents of cytochrome oxidase, cytochromes 551 and 561, whereas the aerobic cultivation enriched cytochrome 554 and hydroquinone oxidase. 10-3 [image] KCN inhibited the endogeneous respiration of the submerged cells alone. The anaerobic cells metabolized nitrate to CO2 and N2 which was inhibited by KCN. In the presence of O2 nitrite was formed from nitrate.