4.4.1.17 cytochrome c biogenesis (system II type) - - PWY-8146 4.4.1.17 cytochrome c biogenesis (system III type) - - PWY-8145 4.4.1.17 Metabolic pathways - 01100 - 4.4.1.17 Porphyrin and chlorophyll metabolism - 00860 -