Figure 4.
Thermal and pH stability test of TCUP2199. (a) TCUP2199 stability at various temperatures; samples were taken at 0, 1, 5, 10, and 24 h. (b) TCUP2199 stability at various pH values; samples were kept at 37 °C for 24 h. The sample titers were checked using a double-layer method. The experiments were performed in triplicate, and the data are shown as the mean ± SEM.