Fig. 3
![Fig. 3](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs41021-020-0144-5/MediaObjects/41021_2020_144_Fig3_HTML.png)
Effects of nicotine at the concentrations of 10− 11, 10− 8 and 10− 6 M on global DNA methylation in HESC. Values represent mean ± SD of three experiments. The Bars marked with different letters represents significantly different from other samples as verified by Tukey’s honestly significant difference multiple comparison test (p < 0.05)