FIG. 4.
Hierarchical cluster analysis of Fur-regulated genes. Columns 1 to 7 correspond to C. jejuni gene expression changes in response to the addition of iron to an iron-limited medium at 1, 3, 5, 7, 9, and 15 min and at mid-log phase, respectively. Columns 8 and 9 represent the change in transcript level of the wild-type C. jejuni strain compared to the fur mutant grown to mid-log phase in iron-limited medium and 15 min after the addition of FeSO4, respectively. The shade of red and green indicates the level of change. Genes are subgrouped into four clusters, named A, B, C, and D.