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News Physiol Sci 3: 223-227, 1988;
1548-9213/88 $5.00
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News in Physiological Sciences, Vol 3, 223-227, Copyright © 1988 by International Union of Physiological Sciences

ARTICLES

Voltage Sensors and Calcium Channels of Excitation-Contraction Coupling

E Rios and G Pizarro

Three mechanisms are proposed for the transduction from action potential to Ca2+ release from the sarcoplasmic reticulum in skeletal muscle: Chemical mediation, a mechanical connection between transverse tubular membrane and sacroplasmic reticulum, and Ca2+-induced release of Ca2+. New biochemical, biophysical, and structural data favor a mechanical connection and add the possibility that Ca2+-induced Ca2+-release is working in parallel.


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