Figure 4

A Spearman's rank correlation of the 155 genes identified to be significantly differentially expressed in microaerophilic compared to aerobic M. tuberculosis growth conditions using unamplified RNA (marked Un). The mean gene expression ratios derived from unamplified RNA and from the products of 500, 50, and 5 ng amplifications using oligo-dT and ADP methods are displayed. Genes are ordered in rows, amplification conditions as columns. Red colouring indicates genes induced in microaerophilic vs. aerobic growth conditions; green colouring denotes repression.