EC 1.3.1.72     
Accepted name: Δ24-sterol reductase
Reaction: 5α-cholest-7-en-3β-ol + NADP+ = 5α-cholesta-7,24-dien-3β-ol + NADPH + H+
Glossary: desmosterol = cholesta-5,24-dien-3β-ol
lanosterol = 4,4,14-trimethyl-5α-cholesta-8,24-dien-3β-ol
zymostrol = 5α-cholesta-8,24-dien-3β-ol
Other name(s): lanosterol Δ24-reductase
Systematic name: sterol:NADP+ Δ24-oxidoreductase
Comments: Acts on a range of steroids with a 24(25)-double bond, including lanosterol, desmosterol and zymosterol.
References:
1.  Bae, S.H. and Paik, Y.K. Cholesterol biosynthesis from lanosterol: development of a novel assay method and characterization of rat liver microsomal lanosterol Δ24-reductase. Biochem. J. 326 (1997) 609–616. [PMID: 9291139]
[EC 1.3.1.72 created 2001]