Fig. 4From: Filamentous ascomycetes fungi as a source of natural pigmentsThe possible carotenoid biosynthetic pathway of Neurospora crassa. The gene products/enzymes responsible for each enzymatic reaction are indicated. Site of chemical changes from precursor molecules are shaded. Molecular groups that distinguish xanthophylls from carotenes are marked with red circles. The pigments found in N. intermedia N-1 are presented in boxes Back to article page