Fig. 2.

Short-range response of a single murine diaphragm fiber. Superposed force and sarcomere length records for a chemically permeabilized murine diaphragm fiber subjected to a single ramp stretch (0.04 l₀, 0.20 l₀⁻¹) imposed under sarcomere length control in three different experimental solutions. The fiber developed a steady-state isometric force equal to ~0.44 of the maximum isometric value measured in pCa 4.5 solution when it was immersed in the pCa 5.7 solution lacking BDM. Experiments were performed at 15°C (unpublished records)