2.7.7.19 6 9 pH 6: 47% (polymerase IIa) and 5% (polymerase IIb) of maximum activity, pH 9: 55% of maximum activity 642953 2.7.7.19 7 8.5 pH 7: about 40% of maximum activity, pH 8-8.5: maximum activity 642963 2.7.7.19 7 8.8 about 50% of maximum activity at pH 7.0 and pH 8.8 642944 2.7.7.19 7 9 about 65% of maximum activity at pH 7.0 and pH 9.0 642962 2.7.7.19 7 9 active in this range 642938 2.7.7.19 7.2 9.2 pH 7.2: 55% of maximum activity, pH 9.2: 62% of maximum activity 642957 2.7.7.19 7.5 9 pH 7.5: 50% of maximum activity, pH 9.0: 15% of maximum activity 642956 2.7.7.19 8 10 pH 8: about 40% of maximum activity, pH 10: about 50% of maximum activity 642943