Number of genes modulated by Gelsemium s. dilutions in the panel of up-regulated genes. In this analysis the 7 genes whose expression was up-regulated by Gelsemium s. 2c were considered. Differences less than or equal to 0.05 were considered null. Blue bars: number of genes with negative fold change (< -0.05); grey bars: number of unaffected genes (from -0.05 to 0.05); pink bars: number of genes with positive fold change (> 0.05). Fisher exact test is not significant in any dilution except in the 2c dilution that is significant by definition.