Name	Info	Provider	Link
purD	free resource	BioCyc	https://biocyc.org/gene?orgid=GCF_000054005&id=BAB_RS18025
	subscription/membership/fee required	Elsevier Science	https://linkinghub.elsevier.com/retrieve/pii/S0882-4010(14)00197-1
Cited by Patents in	free resource	The Lens - Patent Citations	https://www.lens.org/lens/search/patent/list?q=citation_id:25546140