33794 ERG4_ERG24 superfamilyThalassiosira pseudonana
GO:0016020 GO:0047598 -
Double layer of lipid molecules that encloses all cells, and, in eukaryotes, many organelles; may be a single or double lipid bilayer; also includes associated proteins.
7-dehydrocholesterol reductase activity
Catalysis of the reaction: cholesterol + NADP+ = cholesta-5,7-dien-3-beta-ol + NADPH + H+.