Name	Info	Provider	Link
	subscription/membership/fee required	Atypon	https://journals.asm.org/doi/10.1128/JB.00733-12?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub 0pubmed
mutT	free resource	BioCyc	https://biocyc.org/gene?orgid=GCF_000013425&id=G1I0R-1656
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23204459/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/23204459