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Changes in nitrite (○) and phosphate (▪) concentrations in anoxically incubated Pseudomonas sp. strain JR12 (protein content, 0.4 g/liter) in culture medium (see Materials and Methods) in which nitrite served as the electron acceptor and butyrate (initial concentration, 5 mM) served as the carbon and electron donor. The dotted line indicates the decrease in nitrite concentrations during incubation of Pseudomonas sp. strain JR12 under similar conditions in medium devoid of phosphate.
