1.3.99.4	5	-	purified recombinant enzyme, 25% activity remaining	
1.3.99.4	5.5	9	over 40% of activity retained within this range	
1.3.99.4	6	9	below pH 6.0 no apparent Tm is observed, indicating that DELTA1-KSTD1 is destabilized at low pH. The higher the pH value, within the range of pH 6.0-9.0, the higher the apparent Tm of DELTA1-KSTD1. At pH 9.0 the apparent Tm of DELTA1-KSTD1 is about 7 K higher than at pH 7.0	
1.3.99.4	6	9	purified recombinant enzyme, over 80% activity remaining	
1.3.99.4	10	-	purified recombinant enzyme, 30% activity remaining