(A) Thermal stability of the activity of recombinant cells. The permeabilized cells were incubated at 45°C (filled triangle), 50°C (empty square), 55°C (filled square), 60°C (empty circle), and 65°C (filled circle) for various incubation times. (B) Thermal stability of enzyme activity. The enzymes were incubated at 45°C (filled triangle), 50°C (empty square), 55°C (filled square), 60°C (empty circle), and 65°C (filled circle) for various incubation times. A sample was withdrawn at each time point and the relative activity was measured. Data represent the means of three separate experiments and error bars represent the standard deviation.