negative regulation of tetrapyrrole metabolic process +
nickel-tetrapyrrole coenzyme metabolic process +
phytochromobilin metabolic process +
porphyrin-containing compound metabolic process +
The chemical reactions and pathways involving any member of a large group of derivatives or analogs of porphyrin. Porphyrins consists of a ring of four pyrrole nuclei linked each to the next at their alpha positions through a methine group.
positive regulation of tetrapyrrole metabolic process +