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Fraction of the ΔdsbB cells overproducing FlgI that was observed to be motile. The fractions of HK295 (dsb+) cells, HK320 (ΔdsbB) cells, and HK320 cells harboring pYZ201 (wild-type FlgI) that were observed to swim were measured. The cells were cultured in M63 glycerol minimal medium in the absence or presence of l-cystine and l-arabinose. Ara, l-arabinose. The motility defect of the ΔdsbB strain was suppressed by overproducing FlgI.
