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Architecture of S. oneidensis MR-1 (AS93) biofilms grown in different media. Displayed are shadow projections of confocal laser scanning microscopy images of 24- and 48-h-old AS93 biofilms grown in flow chambers irrigated with LM (0.5 mM lactate), LM4L (2.0 mM), or LB medium. Bar = 100 μm.
