Supervised microarray analysis. A.) Hierarchical cluster analysis showing the 820 probe sets which were differentially expressed at the 0.001 significance level. The arrays clustering on the left are from control samples, whereas the cluster on the right shows the LT treated samples. Up-regulated genes are shown in red and down-regulated genes are shown in blue. B.) Biocarta pathway analysis showing the pathways most significantly affected by LT, along with the number of genes and p-value within each pathway that were affected. C.) Correlation of genes altered after treatment with anthrax LT using microarray analysis versus RT-PCR. Spearman correlation coefficient = 0.885.