1. Editorial

   EditorialNotes Pages: 1 - 1

2. Dr Ichiro Matsubara

   • Gerald Offer
   • Jean-Marie Gillis
   • Naoto Yagi

   Obituary Pages: 3 - 4

3. Muscle contraction andin vitro movement: Role of actin?

   • Jean E. Morel
   • Zalika Merah

   News and Views Pages: 5 - 6

4. Ion conduction and discrimination in the sarcoplasmic reticulum ryanodine receptor/calcium-release channel

   • Alan J. Williams

   Review Pages: 7 - 26

5. Resistance to stretch, [Ca²⁺]_i, and activation of swine arterial smooth muscle

   • Christopher M. Rembold

   Papers Pages: 27 - 34

6. Immunoelectron microscopic epitope locations of titin in rabbit heart muscle

   • Sandra Pierobon-Bormioli
   • Donatella Biral
   • Giovanni Salviati

   Papers Pages: 35 - 38

7. Characterization and localization of α-connectin (titin 1): An elastic protein isolated from rabbit skeletal muscle

   • Sumiko Kimura
   • Tetsu Matsuura
   • Koscak Maruyama

   Papers Pages: 39 - 47

8. Spatial relationship of nebulin relative to other myofibrillar proteins during myogenesis in embryonic chick skeletal muscle cellsin vitro

   • Masatoshi Komiyama
   • Zhen-Hua Zhou
   • Yutaka Shimada

   Papers Pages: 48 - 54

9. Avian cardiac tropomyosin gene produces tissue-specific isoforms through alternative RNA splicing

   • Donald E. Fleenor
   • Kathryn H. Hickman
   • Robert B. Devlin

   Papers Pages: 55 - 63

10. Expression of myosin heavy and light chains and phosphorylation of the phosphorylatable myosin light chain in the heart ventricle of the European hamster during hibernation and in summer

    • I. Morano
    • K. Adler
    • W. Hasselbach

    Papers Pages: 64 - 70

11. Relaxant effect of phalloidin on triton-skinned microvascular and other smooth muscle preparations

    • P. J. Boels
    • G. Pfitzer

    Papers Pages: 71 - 80

12. Caldesmon content of mammalian smooth muscles

    • Joe R. Haeberle
    • David R. Hathaway
    • Christina L. Smith

    Papers Pages: 81 - 89

13. Effects of the constitutively active proteolytic fragment of protein kinase C on the contractile properties of demembranated smooth muscle fibres

    • Janice E. Parente
    • Michael P. Walsh
    • Phyllis E. Hoar

    Papers Pages: 90 - 99

14. Z-line/I-band and A-band lattices of intact frog sartorius muscle at altered interfilament spacing

    • Thomas C. Irving
    • Barry M. Millman

    Papers Pages: 100 - 105

15. Diffusion of heavy meromyosin in the presence of F-actin and ATP

    • J. Borejdo
    • S. Burlacu

    Papers Pages: 106 - 116

16. Reappraisal of the role of sodium ions in excitation-contraction coupling in frog twitch muscle

    • B. Allard
    • O. Rougier

    Papers Pages: 117 - 125

17. Errata

    Erratum Pages: 126 - 126

18. Abstracts of the 1990 Annual Meeting on Muscle and Cell Motility Physiology: effect of Ba²⁺ on the excitation-contraction coupling in frog skeletal muscle

    • Kawata H.
    • Hatae J.

    Errata Pages: 126 - 126