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Enzyme temperature stability: (A) Relative activity of APT at a pH-value of 8.0 in a temperature range from 20 °C to 80 °C. (B) Residual activity of APT, PPK, and RNR after 1 h of incubation at the respective temperatures. (C) Residual activity of APT, PPK, and RNR after incubation at 40 °C, measured at several time points up to 24 h.
