Western blot analysis of HSP (GroEL, DnaK, DnaJ, ClpC, ClpP, ClpX, and FtsH) production in B. cereus. Cells were grown to mid-exponential phase at 30°C (column 1) and exposed to mild heat (42°C, 15 min) (column 2), a low temperature (7°C, 2 h) (column 3), 2.5% NaCl (30°C, 30 min) (column 4), 4% ethanol (30°C, 30 min) (column 5), or pH 5 (30°C, 30 min) (column 6).