Table 4.

Common ontologies used across multiple curation databases (“X” indicates ontology in use by the database in column header)

Ontologies	AgBase	TAIR	MGI	Xenbase	MaizeGDB	FlyBase	WormBase
Gene Ontology (7)	X	X	X	X	X	X	X
Plant Ontology (8)	X	X			X
Sequence Ontology (9)			X			X	X