Fig. 1

Hierarchical clustering of differentially transcribed genes in chemostat-grown S. salivarius 57.I and ΔcodY. The expression patterns of differentially expressed genes under all growth conditions between the two strains (a), and the genes directly (b) and indirectly regulated by CodY (c) are shown. Bacterial cells were cultivated in TY containing 20 mM or 100 mM glucose, and the cultures were maintained at pH 7 or 5.5. The mode of CodY regulation is indicated on the right hand side of the figure