1.5.4.1	6-pyruvoyl-tetrahydropterin + glutathione	essential step in the biosynthesis of red components of the flye's eye pigments drosopterins	
1.5.4.1	6-pyruvoyltetrahydropterin + glutathione	enzyme is involved in the formation of the eye pigment drosopterin in Drosophila melanogaster, eye color mutant sepia is missing PDA synthase