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Fig. 4. Myotube relaxation after initial detachment. Representative length-relaxation of control cells (A), cells treated with 50 µM blebbistatin (B) and cells relaxing off other cells (C). The data are fitted to the equation L/Linit=1A(1et /
), where A is the amplitude and
is the time constant. The respective images in A', B' and C' are snapshots of the relaxation with cells outlined by dotted lines. In the case of untreated cells relaxing off other cells (C, C'), the relaxation is so large that the stage is moved to the right 140 µm. The arrow points to the lower cell that is left unperturbed after relaxation of the upper cell. Bars, 10 µm.