Fig. 3: Optimization of the degradation system and visualization of hcPET film degradation.

a Effect of temperature, b pH, and c protein concentration on PET hydrolysis. n = 3 independent experiments. Data were presented as mean values ± SD. d Comparison of the turnover rate of the codisplay cells and purified PETase under the optimal conditions using PET as a substrate. n = 3 independent experiments. Data were presented as mean values ± SD. e SEM image of commercial hcPET film before and after incubation with PETase and codisplay cells. (Scale bar: 5 μm). f Microscopic observation of a cross-section of a commercial hcPET film before and after incubation with PETase and codisplay cells. (Scale bar: 100 μm). g Measurement result of the cross-section of the commercial hcPET film. Data were presented as mean values ± SD. All the experiments are repeated three times independently, with similar results obtained. One representative is shown for (e) and (f). Source data for panels (a–e) and (g) are provided as a Source Data file.