Primary Active Transporters: A Plethora of Plant Plasmalemma Proton Pumps (M.R. Sussman). Studies on the Higher Plant CalmodulinStimulated ATPase (D.E. Evans et al.). Secondary Ion and Metabolite Transporters: ProtonSugar Cotransporters in Plants (N. Sauer). Insights into the Structure of the Chloroplast Phosphate Translocator Protein (H. Wallmeier et al.). Channel Proteins: Soybean Nodulin26 (D.P.S. Verma). Putative LType Calcium Channels in Plants (R. Ranjeva et al.). Receptor Proteins: Hormone Perception and Signal Transduction in Aleurone (R. Hooley et al.). The Auxin Receptor (R.M. Napier, M.A. Venis). Protein Targeting and Assembly in Membranes: Sequence Determinants for Protein Import into Chloroplasts and Thylakoid Membrane Protein Assembly (G. von Heijne). 11 additional articles. Index.