Channelrhodopsin-2 is a leaky proton pump.
Feldbauer K, Zimmermann D, Pintschovius V, Spitz J, Bamann C, Bamberg E.
Feldbauer K, et al. Among authors: bamann c.
Proc Natl Acad Sci U S A. 2009 Jul 28;106(30):12317-22. doi: 10.1073/pnas.0905852106. Epub 2009 Jul 9.
Proc Natl Acad Sci U S A. 2009.
PMID: 19590013
Free PMC article.