Status	Description	Organism	Genes	References
	3-keto-steroid reductase	Sulfurihydrogenibium subterraneum	G17FE-1063
	3-keto sterol reductase	Saccharomyces cerevisiae	ERG27
	C-3 sterol keto reductase (zymosterol)	Yarrowia lipolytica	YALI0_B17644g	[130]