|Category||structural or functional annotations|
|Description||The chemical reactions and pathways leading to the formation of tetrapyrroles, natural pigments containing four pyrrole rings joined by one-carbon units linking position 2 of one pyrrole ring to position 5 of the next. (Gene Ontology, GO_0033014)|
|Downloads & Tools|
5 proteins participating in the tetrapyrrole biosynthesis pathway from the HumanCyc Pathways dataset.