1.5.3.5 5 40 1 h, no loss of activity 741686 1.5.3.5 40 - 75% activity after 15 min 392438 1.5.3.5 50 - 1 h, about 15% loss of activity 741686 1.5.3.5 50 - 9% activity after 5 min 392438 1.5.3.5 60 - 1 h, about 65% loss of activity 741686 1.5.3.5 60 - 2% activity after 5 min 392438 1.5.3.5 60 - 38% residual activity after 120 min 765711 1.5.3.5 60 - 50% residual activity after 35 min 765711