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Macrocolony biofilm properties of the rpoS mutant in comparison to the wild-type. (A) Macrocolony morphology of the wild-type and the rpoS mutant grown on Congo red and Coomassie brilliant blue plates for 7 days. (B,C) Transmission electron micrographs of the macrocolony biofilms at ×11,500 and ×20,500 magnification. Matrix materials surrounding the cells are marked with red arrows.
