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Relationship of fiber relaxation parameters and resting sarcomere length. Fraction of myosin in disordered-relaxed (DRX) (A) and super-relaxed (SRX) (B) in relationship to fiber sarcomere length. Lifetime (τ) of nucleotide turnover by myosin in DRX (C) and SRX (D) related to fiber sarcomere length. Correlations were determined with Pearson’s correlation coefficient (r). Individual symbols are values from each nucleotide exchange experiment for that fiber and color coded by volunteer.
