Figure 7
The effect of P i limitation on pigA , smaI and rap transcription. β-Galactosidase activity was measured from a chromosomal (A) pigA::lacZ (MCP2L), (B) smaI::lacZ (LC13) or (C) rap::lacZ (RAPL) strain throughout growth in phosphate-limiting medium with (squares) or without (triangles) the addition of 5 mM KH2PO4. In all graphs, solid lines represent β-galactosidase assays and dashed lines represent bacterial growth.