All CLC proteins transport Cl− across membranes. However, the family includes both Cl− channels and Cl−/H+ antiporters, proteins once thought to operate by dramatically different mechanisms. An apparent evolutionary relic, a proton-transport apparatus in a CLC channel, reveals deep intertwinings between channel and transporter mechanisms.
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Mindell, J. The chloride channel's appendix. Nat Struct Mol Biol 15, 781–783 (2008). https://doi.org/10.1038/nsmb0808-781
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DOI: https://doi.org/10.1038/nsmb0808-781
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