2.6.1.2 additional information - pyridoxal 5-phosphate, L-alanine or 2-oxoglutarate protect against heat inactivation 636723 2.6.1.2 22 - isoenzymes 2 and 3, 10-20% loss of activity after 3 h 636719 2.6.1.2 40 - 30 min, 50% loss of activity at pH 7.5, 5% loss of activity at pH 9.0 636724 2.6.1.2 40 - the protein is stable until 40°C and above that temperature starts to denature with a melting temperature of 50°C 760093 2.6.1.2 50 - 50% loss of activity after 10 min 636723 2.6.1.2 50 - quickly inactivated, 100 mM alanine gives slight protection 636720 2.6.1.2 60 - more than 85% loss of activity after 5 min 636723