Converting a light-driven proton pump into a light-gated proton channel.

Abstract excerpt

There are two types of membrane-embedded ion transport machineries in nature. The ion pumps generate electrochemical potential by energy-coupled active ion transportation, while the ion channels produce action potential by stimulus-dependent passive ion transportation. About 80% of the amino acid residues of the light-driven proton pump archaerhodopsin-3 (AR3) and the light-gated cation channel channelrhodopsin...

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