Dividing cells feel their way out of warp
Watch dividing cells feel their way out of warp. Here, a micropipette is used to deform single-celled protozoa in the process of dividing. The blue indicates the micropipette at the site of deformation. The red indicates the genetic contents of the cell. Green fluorescent-tagged myosin II and cortexillin I collect at the site of disturbance and, when the two proteins accumulate to a certain level, allow the cell to escape the pipette and assume its original shape. After the cell rights itself, the proteins realign along the cells midline which pinches in to divide symmetrically into two daughter cells.