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Photomicrographs of a defined coculture and pure culture of strain SI. Shown are a phase-contrast micrograph (A) and a fluorescent micrograph (B) of the same field with strain SI in coculture with M. thermoautotrophicum strain ΔH grown on ethanol medium. (C) Phase-contrast micrograph of strain SI grown on pyruvate in pure culture. Bars, 10 μm.
