Na-linked transport of organic solutes; the coupling between electrolyte and non-electrolyte transport in cells. A symposium held under the auspices of the International Union of Physiological Sciences and of the Gesellschaft für Biologische Chemie in Erbach/Rheingau, Germany, August 3-5, 1971. Edited by Erich Heinz with the assistance of H. Kromphardt and B. Pfeiffer.