1.5.4.1	pyrimidodiazepine synthase	drosopterin and aurodrosopterin biosynthesis	-	
3.5.4.3	guanine deaminase	drosopterin and aurodrosopterin biosynthesis	-	
3.5.4.16	GTP cyclohydrolase I	drosopterin and aurodrosopterin biosynthesis	-	
4.2.3.12	6-pyruvoyltetrahydropterin synthase	drosopterin and aurodrosopterin biosynthesis	-