Cholesterol dehydrogenase is an enzyme that uses nicotinamide adenine dinucleotide/nicotinamide adenine dinucleotide phosphate (NAD(P)) as its cofactor in oxidizing cholesterol to form cholest-4-en-3-one. This enzyme oxidizes the hydroxyl group at the 3 position of the sterol ring to form a ketone.
Form
Freeze dried powder
Activity
10U/mg-solid or more
CAS No.
67775-34-2
Isoelectric point
4.5
Unit Definition
One unit produces 1.0 μmole of cholesten-4-en-3-one per minute at pH 8.5 at 25 °C.
Activators
Triton X-100
Storage
at -20°C
Preparation Instructions
For the activity assay, the enzyme is dissolved in 0.02 M phosphate buffer with 2.5% TRITON X-100.