1.3.99.6	5	-	-	287079	
1.3.99.6	7	8	-	391381	
1.3.99.6	8.5	10.5	pH 8.5: about 40% of maximal activity, pH 10.5: about 20% of maximal activity	389552	
1.3.99.6	9	-	above pH 9.0, the rate of DELTA4-5beta-dehydrogenase reaction increases with pH to the limit where accurate measurement can be made, pH 9.0	391402