5.3.3.2 37 - half-life in dilute solution: 30 min. In more concentrated solutions of the protein or dilute enzyme in the presence of 0.01% bovine serum albumin, little loss of activity after 1 h 2944 5.3.3.2 70 - 1h, IDI retained 50% of the activity 660902 5.3.3.2 48 - melting temperature of mutant Y104A 680660 5.3.3.2 55 - melting temperature of mutant Y104F 680660 5.3.3.2 69 - melting temperature of wild-type 680660 5.3.3.2 80 - 10 min, more than 90% residual activity 695056