1. False labelling of comerically available ³H-catecholamines?

   • K. Starke
   • A. Steppeler
   • U. Trendelenburg

   Letter to the Editor Pages: 109 - 112

2. Acetylcholine in human placenta

   • Frank Welsch
   • William C. Wenger

   Papers Pages: 113 - 118

3. Effect of low calcium and of oxotremorine on the kinetics of the evoked release of [³H]acetylcholine from the guinea-pig myenteric plexus; comparison with morphine

   • John C. Szerb

   Papers Pages: 119 - 127

4. Pharmacological evidence for a functional role of the prejunctional alpha-adrenoreceptor in noradrenergic neurotransmission in the conscious rat

   • R. M. Graham
   • W. H. Stephenson
   • W. A. Pettinger

   Papers Pages: 129 - 138

5. Affinities of catecholamines for extraneuronal uptake in smooth muscle cells in trachealis muscle of guinea-pig

   • Lesley J. Bryan
   • Stella R. O'Donnell

   Papers Pages: 139 - 146

6. Effect of adenosine on sinoatrial and ventricular automaticity of the guinea pig

   • A. J. Szentmiklósi
   • M. Németh
   • L. Szekeres

   Papers Pages: 147 - 149

7. Regional distribution and biochemical properties of ¹²⁵I-Tyr⁸-substance P binding sites in synaptic vesicles

   • Alois Saria
   • Norbert Mayer
   • Maria Pabst

   Papers Pages: 151 - 157

8. Effects of phthalazinol on smooth muscle cells of the porcine coronary artery and on neuromuscular junction on the guinea-pig vas deferens

   • K. Kitamura
   • K. Tajima
   • H. Kuriyama

   Papers Pages: 159 - 167

9. Effects of psychotropic drugs on the distribution of ³H-dopamine into compartments of rat striatal synaptosomes and on subsequent depolarization-induced ³H-dopamine release

   • Cees D. J. de Langen
   • Arie H. Mulder

   Papers Pages: 169 - 177

10. Biphasic effects of direct, but not indirect, GABA mimetics and antagonists on haloperidol-induced catalepsy

    • P. Worms
    • K. G. Lloyd

    Papers Pages: 179 - 184

11. The effects of 5-HT uptake- and MAO-inhibitors on l-5-HTP-induced excitation in rats

    • R. Ortmann
    • P. C. Waldmeier
    • A. Delini-Stula

    Papers Pages: 185 - 192

12. An improved assay of cyclic 3′,5′-nucleotide phosphodiesterases with QAE-Sephadex columns

    • Anna C. Bauer
    • Ulrich Schwabe

    Papers Pages: 193 - 198

13. Naloxone increases carbon dioxide stimulated respiration in the rabbit

    • E. Beubler

    Short Communication Pages: 199 - 203