ATP: AMP phosphotransferase (EC 2.7.4.3) from yeast Reaction Equation: ATP + AMP = ADP + ADP Total Protein: ~1-30mg pH: 6.5-7.5 Activity: ~3000U/ml Specific Activity: > 200U/mg protein (at 25°C and pH7.5) Unit Definition of Activity: One unit is defined as the amount of enzyme that will convert 1.0umol ATP and 1.0umol AMP to 2umol ADP per min at 25°C, pH 7.5. Note: 1 KU = 1000 units. Contaminants: ATPase ≤ 0.01% Phosphoglycerate kinase ≤ 0.1%