Name	Info	Provider	Link
ypfD	free resource	BioCyc	https://biocyc.org/gene?orgid=BSUB&id=BSU22880
	free resource	Wiley	https://onlinelibrary.wiley.com/resolve/openurl?genre=article&sid=nlm:pubmed&issn=0168-6445&date=1998&volume=22&issue=4&spage=207
	subscription/membership/fee required	Silverchair Information Systems	https://academic.oup.com/femsre/article-lookup/doi/10.1111/j.1574-6976.1998.tb00368.x