2.7.4.8 2-mercaptoethanol does not stabilize 642686 2.7.4.8 20% glycerol stabilizes: 90% original activity retained 642690 2.7.4.8 bovine serum albumin stabilizes during purification 642698 2.7.4.8 dialysis against water, pH 6 with several changes of outer fluid inactivates, stable to dialysis for less than 36 h without changing the outer fluid 642685 2.7.4.8 dilution inactivates calf thymus enzyme, KCl protects, not bovine serum albumin 642685 2.7.4.8 freeze-thawing rapidly inactivates 642686 2.7.4.8 KCl does not prevent heat inactivation 642685 2.7.4.8 unstable in dilute solutions, below 0.005 mg/ml, bovine serum albumin or other suitable proteins protect, highly purified enzyme is stabilized by the presence of lactic dehydrogenase and pyruvate kinase 642687