6.3.2.24 2.2 9.5 KTP production is highest at pH 7.4, and is approximately half of that at pH 9.5. Production is markedly lower under acidic conditions at pH 3.8 and pH 2.2 745971 6.3.2.24 8 10 28% of maximal activity at pH 8, 85% of maximal activity at pH 10 648947