1. Yanagida, T., Nakase, M., Nishiyama, K. & Oosawa, F. (1984) Direct observation of motion of single F-actin filaments in the presence of myosin. Nature (London) 307,58 - 60.
2. Kron, S.J. & Spudich, J.A. (1986) Fluorescent actin filaments move on myosin fixed to a glass surface. Proc. Natl Acad. Sci. U.S.A. 83, 6272 - 6276.
3. Sheetz, M.P. & Spudich, J.A. (1983) Movement of myosin-coated fluorescent beads on actin cables in vitro. Nature (London) 303,31 - 35.
4. Sheetz, M.P., Chasan, R. & Spudich, J.A. (1984) ATP-dependent movement of myosin in vitro: Characterization of a quantitative assay. ]. Cell Biol. 99,1867-1871.
5. Sellers, J.R., Spudich, J.A. & Sheetz, M.P. (1985) Light chain phosphorylation regulates the movement of smooth muscle myosin on actin filaments. J. Cell Biol. 101,1897 -1902.
6. Homsher, E., Wang, F. & Sellers, J.R. (1992) Factors affecting movement of F-actin filaments propelled by skeletal muscle heavy meromyosin. Am. J. Physiol. 262, C714 - C723.
8. Krön, S.J., Toyoshima, Y.Y., Uyeda, T.Q. & Spudich, J.A. (1991) Assays for actin sliding movement over myosin coated surfaces. Mäh. Enzymol. 196,399-416.
9. Takiguchi, K., Hayashi, H., Kurimoto, E. & Higashi-Fujime, S. (1990) In vitro motility of skeletal muscle myosin and its proteolytic fragments. J. Biochem. (Tokyo) 107,671 - 679.
10. Toyoshima, Y.Y., Krön, S.J., McNally, E.M., Niebling, K.R., Toyoshima, C. & Spudich, J.A. (1987) Myosin subfragment-1 is sufficient to move actin filaments in vitro. Nature (London) 328,536-539.
11. Honda, H., Nagashima, H. & Asakura, S. (1986) Directional movement of F-actin in vitro. J. Mol. Biol. 191,131 - 133.
12. Uyeda, T.Q., Kron, S.J. & Spudich, J.A. (1990) Myosin step size. Estimation from sliding movement of actin over low densities of heavy meromyosin. }. Mol. Biol. 214,699 - 710.
14. Borejdo, J. & Burlacu, S. (1992) Velocity of movement of actin filaments in vitro motility assay. Biophys. J. 61,1267- 1280.
15. Hayashi, H., Takiguchi, K. & Higashi-Fujime, S. (1989) Measurement of ATPase activity of immobilized myosin heads.}. Biochem. 105,875 -877.
16. Harada, Y., Noguchi, A., Kishino, A. & Yanagida, T. (1987) Sliding movement of single actin filaments on one-headed myosin filaments. Nature (London) 326,805 - 808.
17. Lowey, S., Waller, G.S. & Trybus, K.M. (1993) Skeletal muscle myosin light chains are essential for movement. Biophys. J. 64,7a.
18. Harrington, W.F. (1979) On the origin of the contractile force in skeletal muscle. Proc. Natl. Acad. Sci. U.S.A. 68,685 - 689.
19. Sellers, J.R. & Adelstein, R.S. (1987) Regulation of contractile activity; in The Enzymes (Boyer, P.D., ed.) vol. 18, pp. 381 - 418, Academic Press, Orlando.
20. Hartshorne, D.J. (1987) Biochemistry of the contractile process in smooth muscle; in Physiology of the Gastrointestinal Tract (Johnson, L.R., ed.) pp. 423 - 482, Raven Press, New York.
22. Okagaki, T., Higashi-Fujime, S., Ishikawa, R., Takano-Ohmuro, H. & Kohama, K. (1991) In vitro movement of actin filaments on gizzard smooth muscle myosin: Requirement of phosphorylation of myosin light chain and effects of tropomyosin and caldesmon. J. Biochem. (Tokyo) 109,858 - 866.
23. Daniel, J.L., Molish, I.R. & Holmsen, H. (1981) Myosin phosphorylation in intact platelets. J. Biol. Chem. 256,7510 - 7514.
24. Umemoto, S. & Sellers, J.R. (1990) Characterization of in vitro motility assays using smooth muscle and cytoplasmic myosins. }. Biol. Chem. 265,14864 -14869.
25. Horowitz, A. & Trybus, K.M. (1993) Inhibition of smooth muscle myosin's activity and assembly by an antirod monoclonal antilx>dy. J. Biol. Chem. 267,26091 - 26096.
26. Korn, E.D. & Hammer, J.A. Ill (1990) Small myosins. Curr. Opin. Cell Biol. 2,57 - 61.
28. Zot, H.G., Doberstein, S.K. & Pollard, T.D. (1992) Myosin-I moves actin filaments on phospholipid surface: Implications for membrane targeting. J. Cell Biol. 116,367 - 376.
29. Burton, K. (1992) Myosin step size: Estimates from motility assays and shortening muscle. J. Muscle Res. Cell Motil. 13,590 - 607.
30. Yanagida, T., Arata, T. & Oosawa, F. (1985) Sliding distance of actin filament induced by a myosin crossbridge during one ATP hydrolysis cycle. Nature (London) 316,366 - 369.
31. Harada, Y., Sakurada, K., Aoki, T., Thomas, D.D. & Yanagida, T. (1990) Mechanochemical coupling in actomyosin energy transduction studied by in vitro assay.}. Mol. Biol. 216,49 - 68.
32. Uyeda, T.Q.P., Warrick, H.M., Kron, S.J. & Spudich, J.A. (1991) Quantized velocities at low myosin densities in an in vitro motility assay. Nature (London) 352,307 - 311.
33. Toyoshima, Y.Y., Kron, S.J. & Spudich, J.A. (1990) The myosin step size: Measurement of the unit displacement per ATP hydrolyzed in an in vitro assay. Proc. Natl. Acad. Sei. U.S.A. 87,7130 - 7134.
34. Higuchi, H. & Goldman, Y.E. (1991) Sliding distance between actin and myosin filaments per ATP molecule hydrolysed in skinned muscle fibers. Nature (London) 352,352 - 354.
35. Lombardi, V., Piazzesi, G. & Linari, M. (1992) Rapid regeneration of the actin-myosin power stroke in contracting muscle. Nature (London) 355,638 - 641.
36. Kishino, A. & Yanagida, T. (1988) Force measurements by micromanipulation of a single actin filament by glass needles. Nature (London) 334,74 - 76.
37. Ishijima, A., Doi, T., Sakurada, K. & Yanagida, T. (1991) Sub-piconewton force fluctuations of actomyosin in vitro. Nature (London) 352, 301 - 306.
38. Toyoshima, Y.Y., Toyoshima, C. & Spudich, J.A. (1989) Bidirectional movement of actin filaments along tracks of myosin heads. Nature (London) 341,154 -156.
39. Sellers, J.R. & Kachar, B. (1990) Polarity and velocity of sliding filaments: Control of direction by actin and of speed by myosin. Science 249,406 - 408.
40. Yamada, A. & Wakabayashi, T. (1993) Movement of actin away from the center of reconstituted rabbit myosin filament is slower than in the opposite direction: Brief communication. Biophys. J. 64,565 - 569.
41. Harriss, D.E. & Warshaw, D.M. (1993) Smooth and skeletal muscle actin are mechanically indistinguishable in the in vitro motility assay. Circ. Res. 72,219 - 224.
42. Kron, S.J., Drubin, D.G., Botstein, D. & Spudich, J.A. (1992) Yeast actin filaments display ATP- -dependent sliding movement over surfaces coated with rabbit muscle myosin. Proc. Natl. Acad. Sä. U.S.A. 89,4466 - 4470.
43. Yanagida, T. (1984) Angles of fluorescently labeled myosin heads and actin monomers in contracting and rigor stained muscle fibers; in Contractile Mechanism in Muscle (Pollack, G.H. & Sugi, H., eds.) pp. 397 - 411, Plenum Publishing Corp., New York.
44. Borovikov, Yu.S. & Kąkol, I. (1991) Conformational changes of contractile proteins accompanying modulation of skeletal muscle contraction. Polarized microfluorimetry investigations. Gen. Physiol. Biophys. 10, 245 - 264.
45. Kąkol, I., Borovikov, Yu.S., Szczęsna, D., Kirillina, V.P. & Levitsky, D.I. (1987) Conformational changes of F-actin in myosin free ghost single fiber induced by either phosphorylated or dephosphorylated heavy meromyosin. Biochim. Biophys. Acta 913,1-9.
46. Nowak, E., Borovikov, Yu.S., Khoroshev, M. & Dąbrowska, R. (1991) Troponin I and caldesmon restrict alterations in actin structure occurring on binding of myosin subfragment 1. FEBS Lett. 281,51-54.
47. Oosawa, F. (1983) Macromolecular assembly of actin. Muscle Non-Muscle Motil. 1,151 - 216.
48. Schutt, C.E., Lindberg, U., Myslik, J. & Strauss, N. (1989) Molecular packing in profilin:actin crystals and its implications. }. Mol. Biol. 209,735 -746.
49. Schwyter, D.H., Kron, S.J., Toyoshima, Y.Y., Spudich, J.A. & Reisler, E. (1990) Subtilisin cleavage of actin inhibits in vitro sliding movement of actin filaments over myosin. J. Cell. Biol. Ill, 465 - 470.
50. Próchniewicz, E. & Yanagida, T. (1990) Inhibition of sliding movement of F-actin by crosslinking emphasizes the role of actin structure in the mechanism of motility. J. Mol. Biol. 216,761 - 772.
51. Honda, H. & Asakura, S. (1989) Calcium- -triggered movement of regulated actin in vitro. J. Mol. Biol. 205,677 - 683.
52. Williams, D.L., Greene, L.E. & Eisenberg, E. (1984) Comparison of effects of smooth and skeletal muscle tropomyosins on interaction of actin and myosin subfragment 1. Biochemistry 23,4150 - 4155.
53. Walsh, M.P. (1991) Calcium-dependent mechanisms of regulation of smooth muscle contraction. Biochem. Cell Biol. 69,771 - 800.
54. Shirinsky, V.P., Biryukov, K.G., Hettasch, J.M. & Sellers, J.R. (1992) Inhibition of relative movement of actin and myosin by caldesmon and calponin.}. Biol. Chem. 267,15886 - 15892.
55. Ishikawa, R., Okagaki, T., Higashi-Fujime, S. & Kohama, K. (1991) Stimulation of the interaction between actin and myosin by Physarum caldesmon-like protein and smooth muscle caldesmon. J. Biol. Chem. 266,21784 - 21790.
56. Haeberle, J.R., Trybus, K.M., Hemric, M.E. & Warshaw, D.M. (1992) The effects of smoothmuscle caldesmon on actin filament motility. /. Biol. Chem. 267,23001 - 23006.
57. Johara, M., Toyoshima, Y.Y., Ishijima, A., Kojima, H., Yanagida, T. & Sutoh, K. (1993) Charge-reversion mutagenesis of EHctyostelium actin to map the surface recognized by myosin during ATP-driven sliding motion. Proc. Natl. Acad. Sci. U.S.A. 90,2127 - 2131.
58. Sheperd, G.M., Corey, D.P. & Block, S.M. (1990) Actin cores of hair stereocilia support myosin motility. Proc. Natl. Acad. Sci. U.S.A. 87, 8627 - 8631.
59. Nishizaka, T., Yagi, T., Tanaka, Y. & Ishiwata, S. (1993) Right-handed rotation of an actin filament in an in vitro motile system. Nature (London) 361, 269 - 271.