5.4.3.8 Biosynthesis of secondary metabolites - 01110 - 5.4.3.8 heme metabolism heme metabolism - - 5.4.3.8 Metabolic pathways - 01100 - 5.4.3.8 Microbial metabolism in diverse environments - 01120 - 5.4.3.8 Porphyrin and chlorophyll metabolism - 00860 - 5.4.3.8 tetrapyrrole biosynthesis I (from glutamate) - - PWY-5188