1. Structure and function of viroids

   • D. Riesner
   • G. Steger
   • H. L. SÄnger

   Review Pages: 145 - 170

2. Ultraviolet sensitivity of fly photoreceptors R7 and R8: Evidence for a sensitising function

   • R. C. Hardie
   • K. Kirschfeld

   OriginalPaper Pages: 171 - 180

3. Alamethicin pore formation: Voltage-dependent flip-flop of α-helix dipoles

   • G. Boheim
   • W. Hanke
   • G. Jung

   OriginalPaper Pages: 181 - 191

4. Effect of pH and different substrates on the electrokinetic properties of (Na⁺, K⁺)-ATPase vesicles

   • P. Schlieper
   • R. Steiner

   OriginalPaper Pages: 193 - 206

5. Changes in intracellular calcium ion concentration, in the course of dark adaptation measured by Arsenazo III in the Limulus photoreceptor

   • K. Nagy
   • H. Stieve

   OriginalPaper Pages: 207 - 223