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:000025792	phospho CD28 homodimer (human)	h(CD28/iso:1/SigPep-/Phos:1)*2		located_in	GO:0005886	plasma membrane			Reactome:REACT_20268	EXP	NCBITaxon:9606		Reactome:REACT_20268	20100718	PRO:CNA