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Fig. 4. Ca distribution in the five regions at various stages in the
contraction–relaxation cycle. Inset (top) is a diagram illustrating the
six different stages of force change used for quick-freezing, i.e. at rest
(A), during contraction (B), and at 0.1 s (C), 1 s (D), 3 s (E) and 5 s (F)
after onset of relaxation. The bar shows period of stimulation (S).
(A–F) [Ca] in the five regions along the half sarcomere. Values are
means ± S.E.M. (N=36).
Significant differences in [Ca] in the five regions are also shown;
*P<0.05; ***P<0.001.
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