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. 2013 Jun 4;104(11):2456–2464. doi: 10.1016/j.bpj.2013.02.040

Figure 2.

Figure 2

Force-velocity relation. Velocity of Kip3 (magenta circles), Kip3-HT (green triangles), Kif18A (black diamonds), and Kif18AT777 (cyan squares) is shown as a function of force (positive is a hindering load force and negative is an assisting load force; mean ± SE). Open symbols include slip events resulting in up to 2.5× faster velocities. Inset: Zoom of the positive quadrant showing the zero-force velocity and stall force. Solid lines are linear fits to the data shown in the inset and extrapolated beyond.