1. Intracellular sodium activity and sodium transport inNecturus gallbladder epithelium

   • J. Graf
   • G. Giebisch

   OriginalPaper Pages: 327 - 355

2. Oscillations of membrane potential in L cells

   • Yasunobu Okada
   • Wakoh Tsuchiya
   • Akira Inouye

   OriginalPaper Pages: 357 - 376

3. A mathematical model of proximal tubule absorption

   • Ronald E. Huss
   • John L. Stephenson

   OriginalPaper Pages: 377 - 399

4. Electrochemical investigation of active malic acid transport at the tonoplast into the vacuoles of the CAM plantKalanchoë daigremontiana

   • Ulrich Lüttge
   • Erika Ball

   OriginalPaper Pages: 401 - 422