Fig. 1.

QscR activation by the growth restriction. QscR activity was measured by the PA1897-lacZ fusion and the β-galactosidase activity reflects the QscR activity, since PA1897 is specifically induced by QscR (Lee et al., 2006). Two compatible plasmids, pJL101 (PA1897-lacZ fusion plasmid) and pDY101 (PA2537-overexpressing plasmid) were co-introduced into PA01 cells and the transformed cells were cultivated for 7 h. The β-galactosidase activity and growth were measured at various concentrations of arabinose and plotted as illustrated in Supplementary Fig. S2.