4.6.1.13 isopropanol water-miscible, 30%, activates 652411 4.6.1.13 isopropanol water/isopropanol mixture decreases stability, at 4°C protein secondary structure is stable for at least 1 week in 30% isopropanol, Tm-value for PI-PLC thermal denaturation decreases linearly with added isopropanol, in presence of 30% isopropanol the Tm-value decreases from 53.6 to 30°C, myo-inositol enhances thermostability in isopropanol 650390