Figure 1.

Wedging Is Introduced through a Cell-Cell Interaction that Favors Tilted AB Polarity Vectors

α is the extent of wedging. The blue-red gradient indicates the apical-basal axis.

(A) No wedging ($\alpha =0$), AB polarities (arrows) tend to be parallel.

(B) With isotropic wedging, the tilt α is the same in all directions.

(C) With anisotropic wedging, the tilt has a preferred direction. Blue and red signify, respectively, basal and apical surfaces. $p_i$ and $p_j$ are the AB polarities of cells i and j.

See also Figure S3 and S9, Video S1.