FIG 4 .

Conversion of the heterogeneous population analysis profiles of four MRSA strains to high and homogeneous resistance by induction of the stringent stress response. Population analysis profiles (PAPs) of the four MRSA cultures (strains in Fig. 1A to D) (solid squares), PAPs of H*R derivatives (empty squares), and PAPs determined on agar plates on which the antibiotic was supplemented by sub-MICs (0.03 µg/ml) of mupirocin (solid circles). Asterisks indicate the concentration of oxacillin (100 µg/ml) at which the H*R colonies were picked.