Name	Info	Provider	Link
nuoL	free resource	BioCyc	https://metacyc.org/gene?orgid=META&id=EG12092
Potassium	free resource	MedlinePlus Health Information	https://medlineplus.gov/potassium.html
	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=17583799.ui
	subscription/membership/fee required	Springer	https://dx.doi.org/10.1007/s00203-007-0272-3
Full text from	free resource	Zurich Open Access Repository and Archive	https://doi.org/10.5167/uzh-2317
Full text from	free resource	CORE	https://core.ac.uk/reader/11248950?utm_source=linkout