2.7.1.6 4 - very labile below 641715 2.7.1.6 4.5 - 37°C, 10 min, about 20% loss of activity 641715 2.7.1.6 4.5 6.5 25°C, 30 min, stable 641711 2.7.1.6 5.4 8.8 24 h, less than 20% loss of activity 641708 2.7.1.6 6 - stable above 641715 2.7.1.6 7 - stable 641706