Cell membrane contraction, anaglyph 3D animation. Clip 10 of 10. Final clip in an animation sequence showing protein interactions within a dividing cell. This clip shows an actin_myosin bundle right forming part of the contractile ring at the periphery of the cell. Proteins left are in the surrounding cytoplasm, including those that activate the contractile ring. This contraction a form of cytokinesis is initiated by a wave of calcium ions see K003/3843. Here, the heads of the myosin filaments dark are wrapped around the actin filaments light and pulling them. The full sequence of ten clips shows the interaction between the protein calmodulin CaM, calcium_modulated protein, calcium ions, the MLCK myosin light_chain kinase protein, and the actin_myosin bundles of the cell磗 cytoskeleton, resulting in contraction of the membrane and cell division. To see this clip in 3D, please view using red_blue glasses, with red on the left. For the entire sequence, see clips K003/4492 to K003/4483. For the same sequence as an ordinary animation with labels, see clips K003/3847 to K003/3838.