3.5.4.3 5 8.5 activity relatively low at pH 5.1-5.5, increase in activity above pH 6.0 until pH 8.5, above pH 8.5 activity starts to drop off 209587 3.5.4.3 5 10 - 209591 3.5.4.3 5 10.5 - 209584 3.5.4.3 5.5 9 - 209586 3.5.4.3 5.5 10 - 209593 3.5.4.3 5.6 9.5 - 209594 3.5.4.3 6 9 - 753649