Term Name:	tetrapyrrole biosynthetic process
Synonyms:	tetrapyrrole anabolism, tetrapyrrole biosynthesis, tetrapyrrole formation, tetrapyrrole synthesis
Definition:	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.
Ontology:	GO: Biological Process [GO:0033014]    QuickGO    AmiGO