Name	Info	Provider	Link
butB	free resource	BioCyc	https://biocyc.org/gene?orgid=GCF_000006865&id=L_RS04710
	free resource	HighWire	http://genome.cshlp.org/cgi/pmidlookup?view=long&pmid=11337471
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/11337471/
REBASE ref# 6808	free resource	REBASE - The Restriction Enzyme Database	http://rebase.neb.com/rebase/refs/6808.html
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/11337471
Cited by Patents in	free resource	The Lens - Patent Citations	https://www.lens.org/lens/search/patent/list?q=citation_id:11337471
SILVA LSU Database	free resource	SILVA	http://www.arb-silva.de/search/show/lsu/pubid/11337471