| Literature DB >> 23843386 |
C David Williams1, Mary K Salcedo, Thomas C Irving, Michael Regnier, Thomas L Daniel.
Abstract
Classic interpretations of the striated muscle length-tension curve focus on how force varies with overlap of thin (actin) and thick (myosin) filaments. New models of sarcomere geometry and experiments with skinned synchronous insect flight muscle suggest that changes in the radial distance between the actin and myosin filaments, the filament lattice spacing, are responsible for between 20% and 50% of the change in force seen between sarcomere lengths of 1.4 and 3.4 µm. Thus, lattice spacing is a significant force regulator, increasing the slope of muscle's force-length dependence.Entities:
Keywords: X-ray diffraction; lattice spacing; length–tension curve; muscle contraction; spatially explicit
Mesh:
Year: 2013 PMID: 23843386 PMCID: PMC3730583 DOI: 10.1098/rspb.2013.0697
Source DB: PubMed Journal: Proc Biol Sci ISSN: 0962-8452 Impact factor: 5.349