Differential gene expression under artesunate exposure: transcript distribution among different gene functional categories. "Total" pie-chart: genes present in the 8 different color-coded functional categories as distributed in the genome represented on the DNA array. "over-exp." and "under-exp." pie-charts: distribution of over-expressed and under-expressed genes respectively, among the 8 different functional categories. p-value: p-value of chi-square test of over-expressed gene and under-expressed gene compared to the total genes in the genome represented on the DNA array.