Cooling and pH jump-induced calcium release from isolated cardiac sarcoplasmic reticulum.

Abstract

Rapid-cooling contracture in cardiac muscle preparations is thought to be caused by the release of Ca2+ from the sarcoplasmic reticulum (SR), but the mechanism of this release is unknown. Cooling of isolated canine cardiac SR from 37 to 4 degrees C resulted in the net release of enough Ca2+ to account for rapid-cooling contracture. The release of Ca2+ on… (More)

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