Downloaded from http://rstb.royalsocietypublishing.org/ on March 6, 2016 Membrane transport in flux: the ambiguous interface between channels and pumps Papers of a Discussion Meeting Issue organized and edited by F. M. Ashcroft, D. Gadsby and C. Miller Contents Introduction Introduction. The blurred boundary between channels and transporters F. Ashcroft, D. Gadsby and C. Miller 145 Articles The molecular logic of sodium-coupled neurotransmitter transporters E. Gouaux 149 Interactions of alkali cations with glutamate transporters D. C. Holley and M. P. Kavanaugh 155 Enhanced activity of human serotonin transporter variants associated with autism H. C. Prasad, J. A. Steiner, J. S. Sutcliffe and R. D. Blakely 163 A provisional transport mechanism for a chloride channel-type ClK/HC exchanger C. Miller and W. Nguitragool 175 Proton-coupled gating in chloride channels J. Lı́sal and M. Maduke 181 Leaky ClK–HCO3K exchangers: cation fluxes via modified AE1 J. C. Ellory, H. Guizouarn, F. Borgese, L. J. Bruce, R. J. Wilkins and G. W. Stewart 189 CLC-mediated anion transport in plant cells A. De Angeli, D. Monachello, G. Ephritikhine, J.-M. Frachisse, S. Thomine F. Gambale and H. Barbier-Brygoo 195 The mammalian proton-coupled peptide cotransporter PepT1: sitting on the transporter–channel fence? D. Meredith 203 Proton-coupled protein transport through the anthrax toxin channel A. Finkelstein 209 The structure of the NaC,KC-ATPase and mapping of isoform differences and disease-related mutations J. P. Morth, H. Poulsen, M. S. Toustrup-Jensen, V. R. Schack, J. Egebjerg, J. P. Andersen, B. Vilsen and P. Nissen 217 Peering into an ATPase ion pump with single-channel recordings D. C. Gadsby, A. Takeuchi, P. Artigas and N. Reyes 229 143 Downloaded from http://rstb.royalsocietypublishing.org/ on March 6, 2016 144 Contents Structure and mechanism of ATP-binding cassette transporters K. P. Locher 239 ATP hydrolysis-driven gating in cystic fibrosis transmembrane conductance regulator D. Muallem and P. Vergani 247 SUR1: a unique ATP-binding cassette protein that functions as an ion channel regulator J. Aittoniemi, C. Fotinou, T. J. Craig, H. de Wet, P. Proks and F. M. Ashcroft 257 KCNJ11 knockout morula re-engineered by stem cell diploid aggregation T. J. Nelson, A. Martinez-Fernandez and A. Terzic 269