Figure 4

Two non-connected α helices completing a half-turn rotation around their respective vertical axes. (a) The simplicity of the motion is hidden by the composite overlay of the structures at each time-point. (b) Only the backbone alpha carbons along the helices as well as the gamma carbons from each of the Lysine residues. The short curves and blue-to-red (beginning/end) gradient clearly and efficiently describe the simple half-turn rotation undergone by both helices.