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Mitotic spindle orientation is regulated by the competition between cell shape and cell adhesion geometry (or cell polarity) in various mechanical microenvironments, including (A) cells in the epithelium are adhered by surrounding cells; (B) cells are adhered on the E-cadherin–coated matrix; (C) cells are adhered on FN-coated matrix with retraction fibers; (D) cells are pulled by TCJs; (E) cells are polarized by chemical signals.
