PRO_ID	Object_term	Object_syny	Modifier	Relation	Ontology_ID	Ontology_term	Relative_to	Interaction_with	Evidence_source	Evidence_code	Taxon	Inferred_from	DB_ID	Date	Assigned_by	Comment
PR:000000013	cullin			part_of	GO:0031461	cullin-RING ubiquitin ligase complex			PIRSF:PIRSF017874	ISS		PIRSF:PIRSF017874	PIRSF:PIRSF017874	20080301	PRO:CNA