Model of 10S myosin. Blocked head consists of heavy chain (green), ELC (orange), and RLC (yellow). Free head shows heavy chain (blue), ELC (magenta), and RLC (red). The tail is folded into three segments: segment 1 (subfragment 2), originating from the heads and ending at hinge 1; segment 2, starting at hinge 1 and ending at hinge 2; and segment 3, starting at hinge 2 and ending at the tip of the tail. Based on Burgess et al. (2007) and Lee et al. (2018).