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TEM images of control and niacinamide treated cells. (A,B) E. coli control cells. (C) E. coli under 2.5% Niacinamide treatment. (D) E. coli under 5% Niacinamide treatment. (E) P. aeruginosa control cells. (F) P. aeruginosa under 5% Niacinamide treatment N = nucleoid, Cy = cytoplasm, yellow arrows = dense granules. (A,C) have a 2 µm scale bar, (B,D) have a 5 µm scale bar and (E,F) have a 500 nm scale bar.
