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Changes in nitrate (●), nitrite (○), and phosphate (▪) concentrations in anoxically incubated Pseudomonas sp. strain JR12 (protein content, 0.6 g/liter) in culture medium (see Materials and Methods) containing nitrate as the final electron acceptor and acetate (initial concentration, 10 mM) as the electron and carbon donor. At the indicated time antimycin A was added to the medium at a concentration of 20 μg/ml.
