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Science 24 February 1967:
Vol. 155. no. 3765, pp. 1019 - 1021
DOI: 10.1126/science.155.3765.1019
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Articles

Sarcoplasmic Reticulum of Striated Muscle: Localization of Potential Calcium Binding Sites

Charles W. Philpott 1 and Margaret A. Goldstein 1

1 Biology Department, Rice University, Houston, Texas 77001

Fish branchial muscle stained at a low pH with thorium dioxide shows localization of the stain over the sacroplasmic reticulum. Binding of the positively charged thorium micelles with dissociated acid groups of polyanions in this region suggests a possible mechanism for the storage and release of divalent cations such as calcium.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)