FIG 4.
Effect of vitamin K analogs on production of BP933W. The level of BP933W produced by EDL933 was investigated under uninduced (A), H2O2-induced (B), ciprofloxacin-induced (C), and MMC-induced (D) conditions, in the presence or absence of different types of vitamin K analogs. The concentrations of vitamin K analogs used were 36 μM for MSB, 72 μM for phylloquinone, 72 μM for menaquinone, and 7 μM for menadione. The error bars represent the SD from three independent experiments. *, P < 0.05; **, P < 0.01; ***, P < 0.001 (Student's t test).