Name	Info	Provider	Link
	subscription/membership/fee required	Atypon	https:///www.science.org/doi/10.1126/science.1114057?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub 0pubmed
	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=16109880.ui
REBASE ref# 9043	free resource	REBASE - The Restriction Enzyme Database	http://rebase.neb.com/rebase/refs/9043.html
See the articles recommended by the Faculty of more than 8,000 leading experts in Biology and Medicine.	subscription/membership/fee required	H1 Connect	https://facultyopinions.com/pubmed/16109880
SILVA SSU Database	free resource	SILVA	http://www.arb-silva.de/search/show/ssu/pubid/16109880