Cell shape under the spatially constant bending modulus.

<p>(A) Comparison of cell shapes and curvatures between <i>in vivo</i> (black) and the spatially constant <i>K_c</i> model (colored) under the same cell volume and surface area as the <i>in vivo</i> cells. The values of the contractile ring force (Force) are shown. Higher <i>C_m</i> was observed <i>in vivo</i> (red arrowhead), and the corresponding position is shown in the upper panel. <i>r</i>, <i>z</i>, and <i>s</i> are defined in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0031607#pone-0031607-g001" target="_blank">Fig. 1B</a>. Error bars denote S.D. (B) Comparison of pole-to-furrow distances between the model and <i>in vivo</i> (wild-type, black circles and <i>zen-4</i> mutant, red diamonds). Pole-to-furrow distances and furrow radii were theoretically calculated in the model with or without the contractile ring force (Force) = ∞ (green open circles or purple open diamonds, respectively). The region surrounded by the green open circles and the purple open diamonds is shown in gray. Regions outside of the gray region are shown in yellow. The distances and radii were normalized by multiplying the length by (cell volume [unit volume])^−1/3.