Name	Info	Provider	Link
	subscription/membership/fee required	Atypon	https://journals.asm.org/doi/10.1128/jb.173.16.5220-5223.1991?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub 0pubmed
mrr	free resource	BioCyc	https://ecocyc.org/gene?orgid=ECOLI&id=EG10612
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/1830580/
REBASE ref# 1138	free resource	REBASE - The Restriction Enzyme Database	http://rebase.neb.com/rebase/refs/1138.html
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/1830580
Cited by Patents in	free resource	The Lens - Patent Citations	https://www.lens.org/lens/search/patent/list?q=citation_id:1830580