As their name suggests, myosins were initially believed to be present only in muscle cells. But as more about the motor proteins was discovered, researchers found that members of the large superfamily of myosins can be found in almost all eukaryotic cells. The basic characteristics myosins hold in common are the ability to bind actin, hydrolyze ATP, and transduce force. Fox lung cells appearing in the digital video sequences in this section were fluorescently tagged with mEmerald fused to light chain myosin and a mCherry-Lifeact chimera.