4.1.1.33 40 - thermal denaturation causes rapid structural transitions at and above 40°C and transient exposure of hydrophobic residues at 50°C, leading to aggregation of the protein 747951 4.1.1.33 78 - melting temperature, mutant C210S 734098 4.1.1.33 80 - 1 h, complete loss of activity in presence of 2-mercaptoethanol 734098 4.1.1.33 90 - melting temperature, wild-type 734098