Abstract
After the discovery of troponin by Ebashi almost sixty years ago the field of striated muscle regulation has made significant progress. In the 1970's the nascent troponin field gained momentum, including contributions by James D. Potter who established the stoichiometry of contractile proteins in the myofibril (Arch Biochem Biophys. 1974 Jun; 162(2):436-41. https://doi.org/10.1016/0003-9861(7490202-1)). This opened the door to refinement of competing models that described possible thick filament configurations. This study suggested the presence of one myosin per cross bridge and provided accurate calculations of the molar ratios of each protein - myosin: actin: tropomyosin: troponin T: troponin I: troponin C.
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