Name	Info	Provider	Link
proP	free resource	BioCyc	https://biocyc.org/gene?orgid=ECOLI&id=EG11612
	subscription/membership/fee required	Elsevier Science	https://linkinghub.elsevier.com/retrieve/pii/S0022-2836(83)71030-2
Gene Ontology annotations from this paper	free resource	Gene Ontology	http://amigo.geneontology.org/amigo/reference/PMID:8421314