4.2.99.20 2-carboxy-1,4-naphthoquinol biosynthesis - - 4.2.99.20 Biosynthesis of secondary metabolites - 01110 4.2.99.20 Metabolic pathways - 01100 4.2.99.20 Ubiquinone and other terpenoid-quinone biosynthesis - 00130 4.2.99.20 vitamin K metabolism vitamin K metabolism -