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:000025958	mothers against decapentaplegic homolog 4 isoform 1 monoubiquitinated 2 (human)	hSMAD4/iso:1/MonoUbiq:2|UniProtKB:Q13485-1, Lys-519, MOD:01148		acts_upstream_of_or_within	GO:0030512	negative regulation of transforming growth factor beta receptor signaling pathway			PMID:19135894	EXP	NCBITaxon:9606		UniProtKB:Q13485-1	20101005	PRO:CNA	
PR:000025958	mothers against decapentaplegic homolog 4 isoform 1 monoubiquitinated 2 (human)	hSMAD4/iso:1/MonoUbiq:2|UniProtKB:Q13485-1, Lys-519, MOD:01148	NOT	enables	GO:0046332	SMAD binding			PMID:19135894	EXP	NCBITaxon:9606		UniProtKB:Q13485-1	20101005	PRO:CNA