Name	Info	Provider	Link
hisC	free resource	BioCyc	https://metacyc.org/gene?orgid=META&id=BSU22620
	free resource	Ingenta plc	http://mic.microbiologyresearch.org/pubmed/content/journal/micro/10.1099/mic.0.027839-0
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/19383706/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/19383706
Cited by Patents in	free resource	The Lens - Patent Citations	https://www.lens.org/lens/search/patent/list?q=citation_id:19383706
SILVA SSU Database	free resource	SILVA	http://www.arb-silva.de/search/show/ssu/pubid/19383706