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Literature DB >> 5261029

Cross-bridge properties derived from muscle isotonic velocity transients.

Abstract

The rate constants for the turnover of cross-bridges during frog muscle contraction were determined from an analysis of the motion that follows step decreases in load. For a given projection from the myosin filament, there appears to be a range of about 100 A along the length of the filament over which the projection can attach to the actin filament and form a cross-bridge. The site of attachment is then displaced by a distance of this same order before the link is broken. The values of the rate constants also imply that a cross-bridge is formed each time an actin site comes within range of a myosin projection, so that the turnover of cross-bridges for a given contraction distance is independent of the speed of the motion.

Entities: Gene

Mesh：

Substances：
Muscle Proteins

Year: 1969 PMID： 5261029 PMCID： PMC223373 DOI： 10.1073/pnas.64.2.504

Source DB: PubMed Journal: Proc Natl Acad Sci U S A ISSN： 0027-8424 Impact factor: 11.205

6 in total

1. THE EFFECT OF LOAD ON THE HEAT OF SHORTENING OF MUSCLE.

Authors: A V HILL
Journal: Proc R Soc Lond B Biol Sci Date: 1964-01-14

2. Kinetics of muscular contraction: the approach to the steady state.

Authors: R J PODOLSKY
Journal: Nature Date: 1960-11-19 Impact factor: 49.962

3. An analysis of the mechanical components in frog's striated muscle.

Authors: B R JEWELL; D R WILKIE
Journal: J Physiol Date: 1958-10-31 Impact factor: 5.182

4. Muscle structure and theories of contraction.

Authors: A F HUXLEY
Journal: Prog Biophys Biophys Chem Date: 1957

5. The low-angle x-ray diagram of vertebrate striated muscle and its behaviour during contraction and rigor.

Authors: H E Huxley; W Brown
Journal: J Mol Biol Date: 1967-12-14 Impact factor: 5.469

6. Tension development in highly stretched vertebrate muscle fibres.

Authors: A M Gordon; A F Huxley; F J Julian
Journal: J Physiol Date: 1966-05 Impact factor: 5.182

6 in total

38 in total

10. The dependence of force and shortening velocity on substrate concentration in skinned muscle fibres from Rana temporaria.

Authors: M A Ferenczi; Y E Goldman; R M Simmons
Journal: J Physiol Date: 1984-05 Impact factor: 5.182

Cross-bridge properties derived from muscle isotonic velocity transients.

1. THE EFFECT OF LOAD ON THE HEAT OF SHORTENING OF MUSCLE.

2. Kinetics of muscular contraction: the approach to the steady state.

3. An analysis of the mechanical components in frog's striated muscle.

4. Muscle structure and theories of contraction.

5. The low-angle x-ray diagram of vertebrate striated muscle and its behaviour during contraction and rigor.

6. Tension development in highly stretched vertebrate muscle fibres.

1. Some self-consistent two-state sliding filament models of muscle contraction.

2. On the contractile mechanism of insect fibrillar flight muscle. IV. A quantitative chemo-mechanical model.

3. X-ray diffraction of actively shortening muscle.

4. The relationship of adenosine triphosphatase activity to tension and power output of insect flight muscle.

5. Mathematical simulation of muscle cross-bridge cycle and force-velocity relationship.

6. Effects of elastic loads on the contractions of cat muscles.

7. A kinetic study of muscular contractions.

8. Tension responses of frog sartorius muscle to quick ramp-shaped shortenings and some effects of metabolic inhibition.

9. Tension responses to sudden length change in stimulated frog muscle fibres near slack length.

10. The dependence of force and shortening velocity on substrate concentration in skinned muscle fibres from Rana temporaria.