Name	Info	Provider	Link
	subscription/membership/fee required	Atypon	https://journals.asm.org/doi/10.1128/JB.183.20.5840-5847.2001?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub 0pubmed
nrtB	free resource	BioCyc	https://biocyc.org/gene?orgid=GCF_000009725&id=SGL_RS06590
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/11566981/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/11566981
Cited by Patents in	free resource	The Lens - Patent Citations	https://www.lens.org/lens/search/patent/list?q=citation_id:11566981