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Cross-bridge arrangements in Limulus muscle
Authors:J S Wray  P J Vibert  C Cohen
Affiliation:Laboratory of Structural Biology Rosenstiel Basic Medical Sciences Research Center Brandeis University Waltham, Mass. 02154, U.S.A.
Abstract:X-ray diffraction patterns show Limulus muscle to have a structure in rigor similar to that of insect flight muscle, except that the thick filaments are staggered. Myosin filaments in relaxed muscle bear a highly ordered helical array of cross-bridges which, however, is very labile. The array undergoes a reversible transition between order and disorder in response to changes in ionic strength.
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