Key result
Titin acts as a variable stiffness molecular spring that binds calcium and attaches to actin upon activation, explaining residual force enhancement during eccentric muscle contractions.
The structural protein titin likely contributes to active force production during eccentric muscle contractions by binding calcium and attaching to actin, supporting a new three-filament model of muscle contraction.
No takes yet. Share an insight, caveat, or question.
Supports titin-actin interactions in eccentric force; leaves open validation in cardiac muscle and clinical relevance.
Herzog et al. (2016) conducted a review in Skeletal muscle contraction. Titin was evaluated. Titin acts as a variable stiffness molecular spring that binds calcium and attaches to actin upon activation, explaining residual force enhancement during eccentric muscle contractions.