2.1.2.4 Metabolic pathways - 01100 - 2.1.2.4 One carbon pool by folate - 00670 - 2.1.2.4 Purine metabolism - 00230 - 2.1.2.4 purine metabolism purine metabolism - - 2.1.2.4 purine nucleobases degradation I (anaerobic) - - P164-PWY 2.1.2.4 purine nucleobases degradation II (anaerobic) - - PWY-5497