1.1.99.20 7 - 40% loss of activity at 5°C after 12 h 389906 1.1.99.20 7 8 stable 389908 1.1.99.20 7.5 9 stable at 5°C for 12 h 389906 1.1.99.20 10 - 40% loss of activity at 5°C after 12 h 389906