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- W2014677422 abstract "We describe a method for the removal of endogenous troponin (Tn) complex from bundles of detergent-treated cardiac fibers. After 70 min treatment with cTnT-cTnI most of the endogenous Tn complex was removed from fiber bundles. Complete reconstitution of the Tn complex was achieved by reconstituting with cardiac troponin C (cTnC) in fully relaxing conditions. Ca(2+)-dependent maximum force of the fibers treated with cTnT-cTnI or cTnT-cTnI(33-211), which was used to aid in the visualization of the troponin exchange, decreased to 85-90% of the force developed by fibers before the treatment. SDS-PAGE analysis of the cTnT-cTnI(33-211) and the cTnT(77-289)-cTnI(33-211) treated fiber bundles demonstrated that 70-80% of the endogenous Tn subunits were removed. After reconstitution with cTnC, approximately 80-85% of the Ca(2+)-regulated force was restored in cTnT-cTnI/cTnI(33-211) treated fibers. Our results demonstrate that by minimizing the prolonged exposure of skinned cardiac fiber bundles to rigor conditions, successful exchange of all three subunits of the Tn complex can be accomplished with minimal loss of function." @default.
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- W2014677422 date "1999-09-01" @default.
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- W2014677422 title "An Improved Method for Exchanging Troponin Subunits in Detergent Skinned Rat Cardiac Fiber Bundles" @default.
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- W2014677422 doi "https://doi.org/10.1006/bbrc.1999.1341" @default.
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