1.14.99.54 30 40 100% activity after 150 min and approximately 80% after 1000 min of incubation 735822 1.14.99.54 35 - midpoint transition temperature, pH 4.0, citrate buffer, oxidized enzyme 745381 1.14.99.54 44 - midpoint transition temperature, pH 4.0, acetate buffer, oxidized enzyme 745381 1.14.99.54 48.8 - midpoint transition temperature, pH 6.0, phosphate buffer, presence of ascorbic acid 745381 1.14.99.54 51 - melting temperature, wild-type 741358, 746362 1.14.99.54 53 - midpoint transition temperature, pH 6.0, phosphate buffer, presence of EDTA 745381 1.14.99.54 60 - considerably stable 735822 1.14.99.54 60 - fast degradation 735822 1.14.99.54 60 - melting temperature, mutant S73C/A115C 741358 1.14.99.54 61.5 - midpoint transition temperature, pH 6.0, phosphate buffer, oxidized enzyme 745381 1.14.99.54 63 - melting temperature, mutant A143C/P183C/S73C/A115C 741358, 746362 1.14.99.54 80 - 2 h, 34% residual activity for wild-type 746362 1.14.99.54 80 - 2 h, 34% residual activity. When the three disulfide bridges of the protein are broken, irreversible unfolding occurs and no residual activity can be detected after a similar heat treatment 741358