Numerous electron-opaque deposits appear in the SR of the relaxed smooth muscle cells of the guinea pig Taenia coli that had been treated, before fixation, with a depolarizing medium containing oxalate to precipitate calcium ions in situ. X-ray spectra obtained by spot and line-scanning analyses of these deposits in situ show characteristic calcium signals, thus providing direct evidence for calcium accumulation inside the sarcoplasmic reticulum of smooth muscle.
Article| December 01 1975
Calcium in smooth muscle sarcoplasmic reticulum in situ. Conventional and X-ray analytical electron microscopy.
L M Popescu
Online Issn: 1540-8140
Print Issn: 0021-9525
J Cell Biol (1975) 67 (3): 911–918.
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L M Popescu, I Diculescu; Calcium in smooth muscle sarcoplasmic reticulum in situ. Conventional and X-ray analytical electron microscopy.. J Cell Biol 1 December 1975; 67 (3): 911–918. doi: https://doi.org/10.1083/jcb.67.3.911
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