Cell contractile ring, anaglyph 3D animation. Clip 5 of 10. This clip forms part of an animation sequence showing protein interactions within a dividing cell. This clip shows an actin_myosin bundle forming part of the contractile ring at the periphery of the cell. Proteins are moving through the surrounding cytoplasm, including those that activate the contractile ring. This contraction is initiated by a wave of calcium ions small, fast_moving objects, shown towards the end of the clip. 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.