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Science 17 July 1959:
Vol. 130. no. 3368, pp. 160 - 161
DOI: 10.1126/science.130.3368.160
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Articles

Paramyosin and Contraction of "Catch Muscles"

WILLIAM H. JOHNSON 1, JOSEPH S. KAHN 1, and ANDREW G. SZENT-GYÖRGYI 2

1 Department of Physiology, University of Illinois, Urbana
2 Institute for Muscle Research, Marine Biological Laboratory, Woods Hole, Massachusetts

The isotonic shortening of glycerol-extracted preparations of molluscan catch muscles is inhibited at pH's and ionic strengths at which extracted paramyosin crystallizes. The isometric tension development is hardly altered under the same conditions. Consequently, the "catch mechanism" is explained on the basis of the crystallization of paramyosin.


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Paramyosin: Molecular Length and Assembly.
J. Kendrick-Jones, C. Cohen, A. G. Szent-Gyorgyi, and W. Longley (1969)
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Titration of the Protein Paramyosin.
W. H. JOHNSON and J. S. KAHN (1959)
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