The influence of free calcium on the maximum speed of shortening in skinned frog muscle fibres.

@article{Julian1986TheIO,
  title={The influence of free calcium on the maximum speed of shortening in skinned frog muscle fibres.},
  author={Fred J. Julian and Lawrence C Rome and D. George Stephenson and S Str{\'i}z},
  journal={The Journal of physiology},
  year={1986},
  volume={380},
  pages={
          257-73
        }
}
The influence of [Ca2+] on the maximum velocity of shortening (Vmax) was examined in mechanically skinned Rana pipiens and Rana temporaria fibres using improved force clamps and the slack test techniques. All measurements were made at 7.5 degrees C. At low relative loads (P/P0 less than 0.1), maximally activated R. pipiens fibres shortened more rapidly than did submaximally activated fibres. At higher relative loads, however, little difference in the speed of shortening was observed. Vmax… CONTINUE READING
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