What is the role of titin in active muscle?
by: Jenna A. Monroy, Krysta L. Powers, Leslie A. Gilmore, Theodore A. Uyeno, Stan L. Lindstedt, Kiisa C. Nishikawa
Exercise and sport sciences reviews, Vol. 40, No. 2. (April 2012), pp. 73-78, doi:10.1097/jes.0b013e31824580c6 Key: citeulike:11444118
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Abstract
Several properties of muscle defy explanation solely based on the sliding filament-swinging cross-bridge theory. Indeed, muscle behaves as though there is a dynamic "spring" within the sarcomeres. We propose a new "winding filament" mechanism for how titin acts, in conjunction with the cross-bridges, as a force-dependent spring. The addition of titin into active sarcomeres resolves many puzzling muscle characteristics.
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