1.5.1.20 folate transformations I - - PWY-2201 1.5.1.20 Metabolic pathways - 01100 - 1.5.1.20 Microbial metabolism in diverse environments - 01120 - 1.5.1.20 One carbon pool by folate - 00670 - 1.5.1.20 tetrahydrofolate metabolism tetrahydrofolate metabolism - -