Term Name:	putrescine biosynthetic process
Synonyms:	putrescine anabolism, putrescine biosynthesis, putrescine formation, putrescine synthesis
Definition:	The chemical reactions and pathways resulting in the formation of putrescine, 1,4-diaminobutane; putrescine can be synthesized from arginine or ornithine and is the metabolic precursor of spermidine and spermine.
Ontology:	GO: Biological Process [GO:0009446]    QuickGO    AmiGO