| Namespace | biological_process | Obsolete | false |
| description | 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. |
