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. 2008 May 30;95(5):2529–2538. doi: 10.1529/biophysj.107.124727

FIGURE 3.

FIGURE 3

Force versus probe deflection. Forces were applied in the radial (○) and longitudinal (+) directions at 100 Hz. Spring constants for the probes were determined by averaging the slopes of the least-squares linear fit curves (solid lines) over three frequencies in the radial direction and four frequencies in the longitudinal direction (other frequencies not shown): 1.7 ± 0.4 N/m and 0.36 ± 0.01 N/m, respectively, for this probe. Note that all ranges reported in this study are mean ± SD unless otherwise specified.