1. Introduction. Melatonin and the light-dark zeitgeber in vertebrates, invertebrates and unicellular organisms

   • B. Poeggeler

   Multi-Author Reviews Pages: 611 - 613

2. The presence and function of melatonin and structurally related indoleamines in a dinoflagellate, and a hypothesis on the evolutionary significance of these tryptophan metabolites in unicellulars

   • R. Hardeland

   Multi-Author Reviews Pages: 614 - 622

3. The occurrence and physiological functions of melatonin in the most primitive eumetazoans, the planarians

   • M. Morita
   • J. B. Best

   Multi-Author Reviews Pages: 623 - 626

4. Presence in and effects of pineal indoleamines at very low level of phylogeny

   • G. Csaba

   Multi-Author Reviews Pages: 627 - 634

5. Calmodulin mediates melatonin cytoskeletal effects

   • G. Benítez-King
   • F. Antón-Tay

   Multi-Author Reviews Pages: 635 - 641

6. Melatonin: presence and formation in invertebrates

   • B. Vivien-Roels
   • P. Pévet

   Multi-Author Reviews Pages: 642 - 647

7. Structures and molecules involved in generation and regulation of biological rhythms in vertebrates and invertebrates

   • S. Binkley

   Multi-Author Reviews Pages: 648 - 653

8. The melatonin rhythm: both a clock and a calendar

   • R. J. Reiter

   Multi-Author Reviews Pages: 654 - 664

9. The contribution of extrapineal sites of melatonin synthesis to circulating melatonin levels in higher vertebrates

   • G. Huether

   Multi-Author Reviews Pages: 665 - 670

10. Clinical aspects of the melatonin action: impact of development, aging, and puberty, involvement of melatonin in psychiatric disease and importance of neuroimmunoendocrine interactions

    • F. Waldhauser
    • B. Ehrhart
    • E. Förster

    Multi-Author Reviews Pages: 671 - 681

11. Cardiac activation and inhibition involved in molting behavior of a spiny lobster

    • T. Kuramoto

    Research Articles Pages: 682 - 685

12. Melatonin decreases the amplitude of the b-wave of the human electroretinogram

    • W. Emser
    • R. Dechoux
    • A. Wirz-Justice

    Research Articles Pages: 686 - 687

13. Partition coefficients of drugs in bilayer lipid membranes

    • J. J. Ramsden

    Research Articles Pages: 688 - 692

14. Role of 1,25-dihydroxyvitamin D₃ in the generation of the acute-phase response in rats with talc-induced granulomatosis

    • A. Marušić
    • K. Kos
    • S. Vukičević

    Research Articles Pages: 693 - 698

15. Glucose does not influence the insulin-like growth factor (IGF) binding to carrier proteins (IGFBPs): Analysis of rat and human serum by western ligand blotting

    • S. Cianfarani
    • V. J. Frost
    • J. M. P. Holly

    Research Articles Pages: 699 - 701

16. Physical aspects of delayed luminescence inAcetabularia acetabulum

    • A. Scordino
    • F. Grasso
    • A. Triglia

    Research Articles Pages: 702 - 705

17. Protein aggregation as primary and characteristic cell reaction to various stresses

    • A. E. Kabakov
    • V. L. Gabai

    Research Articles Pages: 706 - 710

18. Circadian rhythmicity is involved in photoperiodic time measurement in the aphidMegoura viciae

    • M. Vaz Nunes
    • J. Hardie

    Research Articles Pages: 711 - 713

19. Queen success is correlated with worker-brood genetic relatedness in a primitively eusocial wasp (Ropalidia marginata)

    • R. Gadagkar
    • K. Chandrashekara
    • S. Bhagavan

    Research Articles Pages: 714 - 717

20. The karyotype ofOxymycterus sp (Cricetidae, Rodentia) from Central Brazil

    • M. Svartman
    • E. J. Cardoso de Almeida

    Research Articles Pages: 718 - 720

21. Hormonal control of pheromone responsiveness in the male black cutwormAgrotis ipsilon

    • C. Gadenne
    • M. Renou
    • L. Sreng

    Research Articles Pages: 721 - 724

22. Intertidal habitat: does the shore level affect the nutritional condition of the shanny (Lipophrys pholis, Teleostei, Blenniidae)?

    • A. Wyttenbach
    • D. G. Senn

    Research Articles Pages: 725 - 728

23. Cytokines and proteoglycans

    • J. J. Nietfeld

    Addendum Pages: 729 - 729

24. Announcements

    Announcement Pages: 730 - 730