Table 2.

Transversal stiffness and Young's modulus of wet muscle fibers in air

	Permeabilized fibers			Triton-treated fibers
	Transversal stiffness (pN/nm)	Young's modulus (MPa)	Measurements (n)	Transversal stiffness (pN/nm)	Young's modulus (MPa)	Measurements (n)
Relaxed
Z	36 ± 3	1.7 ± 0.2	4	81 ± 6	4.5 ± 0.5	35
M	31 ± 3	1.2 ± 0.1	4	59 ± 10	2.9 ± 0.4	24
Activated
Z	70 ± 4	2.6 ± 0.2	4	110 ± 7	6.2 ± 0.4	25
M	45 ± 8	1.3 ± 0.4	3	92 ± 6	5.15 ± 0.5	9
Rigor
Z	92 ± 20	5.7 ± 1.0	25	132 ± 16	7.3 ± 0.9	16
M	54 ± 10	2.7 ± 0.5	9	109 ± 5	6.1 ± 0.3	17

Z and M correspond to measurement taken at the Z-disk and M-band projections on the fiber surface.