Name	Info	Provider	Link
nrdA	free resource	BioCyc	https://ecocyc.org/gene?orgid=ECOLI&id=EG10660
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/22616862/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/22616862
	free resource	NCI CPTC Antibody Characterization Program	https://antibodies.cancer.gov/detail/CPTC-HLA-B-1
	subscription/membership/fee required	Silverchair Information Systems	https://portlandpress.com/biochemsoctrans/article-lookup/doi/10.1042/BST20120081