Figure 4. The conversion of 2-OH-PCA to 2-OH-PHZ in phosphate buffer at different temperatures (PBS solution stored in complete darkness).
A and B. Degradation of 2-OH-PCA. C. The changes of 2-OH-PHZ over time. filled square 28°C; empty circle 37°C; filled triangle 55°C; empty diamond 70°C. Error bars represent standard deviations of data from triplicate samples. The coefficient of variation(standard deviation/mean×100) was below 7% in all cases.