Figure 2.

Histograms of myosin tension, force density and wall force. Frequency for all histograms is scaled by the maximum frequency. Data is shown for 500 runs for thin bundles (with five mini-filaments), 500 runs for thick bundles (with one minifilament) and 250 runs for networks (with one mini-filament). Positive tension and force correspond to contraction. Myosin mini-filament tension scaled by myosin stall force for a) thin bundles, b) thick bundles, and c) networks. Mean values are 0.72, 0.58, and 0.77, respectively. Force density on walls per minifilament for d) thin bundles, e) thick bundles, and f) networks. Mean values are 0.64 pNµm⁻¹, 0.28 pNµm⁻¹, and 0.07 pNµm⁻¹, respectively. Wall force scaled by sum of myosin tensions for g) thin bundles, h) thick bundles, and i) networks. Mean values are 0.99, 2.58, and 0.35, respectively. (About 10 runs in h) which gave values greater than 10 were omitted for clarity. These values were exaggerated because they are due to very small T_m values of mini-filaments that moved to dangling ends, rather than to amplification by the network effects.)