1.1.1.170	3beta-hydroxysteroid-4alpha-carboxylate 3-dehydrogenase (decarboxylating)	zymosterol biosynthesis	-	
1.1.1.270	3beta-hydroxysteroid 3-dehydrogenase	zymosterol biosynthesis	-	
1.3.1.70	DELTA14-sterol reductase	zymosterol biosynthesis	-	
1.14.14.154	sterol 14alpha-demethylase	zymosterol biosynthesis	-	
1.14.18.9	4alpha-methylsterol monooxygenase	zymosterol biosynthesis	-