Fig. 4

Venn diagrams to show the overlap of significantly up- and down-regulated genes among different treatments. Comparison of significantly up- (a) and down–regulated genes (b) among P, HC and PHC treatments after 24 h of treatment. Microarray data analyses yielded 6410 significantly up- and 5059 significantly down-regulated genes by the 3 treatments with at least two fold changes (p < 0.05, n = 3)