heme catabolic process heme B catabolic process https://github.com/geneontology/go-ontology/issues/31634 The chemical reactions and pathways resulting in the breakdown of heme b, a Fe(II) porphyrin complex readily isolated from the hemoglobin of beef blood, but also found in other proteins including other hemoglobins, myoglobins, cytochromes P-450, catalases, peroxidases as well as b type cytochromes. GO:1900548 protoheme degradation pr heme B breakdown protoheme catabolic process heme B catabolism 2012-05-14T12:35:18Z MetaCyc:PWY-5874 heme B degradation MetaCyc:PWY-7848 MetaCyc:PWY-7844 MetaCyc:PWY-7845 MetaCyc:PWY-7846 MetaCyc:PWY-7847 biological_process MetaCyc:PWY-7843