Fig. 7: The antioxidant ability of ferritin in transgenic E. coli.

a Spot assay of the different transgenic E. coli under the pressure of paraquat of three independent experiments with similar results. Ctrl referred to groups without paraquat treatment. b, c The growth curve of different ferritin transgenic E. coli with or without the paraquat stimulation; the data are mean ± SD (n = 3 independent experiments); the significant difference was evaluated by the Two-way ANOVA with post-hoc Tukey HSD test. d The colony formation amount of the ferritin transgenic E. coli with or without the paraquat stimulation; the data are mean ± SD (n = 3 independent experiments); the significant difference was evaluated by the One-way ANOVA with post-hoc Tukey HSD test. e Representative SEM images of ferritin transgenic E. coli after the paraquat treatment of three independent experiments with similar results; the scale bar referred to 0.5 μm. f Digital images of replated ferritin transgenic E. coli after the paraquat treatment of three independent experiments with similar results. g ROS levels of the different ferritin transgenic E. coli after the paraquat treatment. h Spot assay of the WT, Bfr knockout (Bfr KO) and Bfr substitution strain (HFn/Bfr) of three independent experiments with similar results. i ROS levels of WT, Bfr knockout and substitution strain after the paraquat treatment. Source data are provided as a Source Data file.