FIG 1.

Regulation and monitoring of developmental pathways in Bt. (A) Schematic representation of the regulatory links among PlcR, NprR, and the sporulation regulators. Dashed lines indicate protein-protein or peptide-protein interactions, whereas solid lines indicate a transcriptional effect. Arrows and broken lines represent activation and repression, respectively. (B) Fluorescent reporter constructs used to monitor the activity of the regulators controlling differentiation in a virulent, a necrotrophic, or a sporulating cell type.