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Fig. 2. Characteristic distribution of traction stress for wild-type, mlcE and mhcA cells. Color-coded vector maps of the traction stresses generated by wild-type (A), mlcE (B), and mhcA (C) cells, moving in the direction indicated (arrow). The length and orientation of arrows in the vector map represent the magnitude and direction of traction stresses. Note that the traction vector scale bar (horizontal arrow) in each map represents a traction stress that differs by approximately an order of magnitude between each cell type. Colored regions represent areas of traction stress within the same magnitude range. Areas of high (
90th percentile) traction stress are represented by red and purple colors, while areas of low traction stress are shown in gray, blue and light green.