https://www.ncbi.nlm.nih.gov/Structure/pdb/6OW4
6OW4: Structure of the NADH-bound form of 20beta-Hydroxysteroid Dehydrogenase from Bifidobacterium...
Oxidoreductase, short chain dehydrogenase/reductase family proteinNICOTINAMIDE-ADENINE-DINUCLEOTIDE
of the