Figure 7

Visualization of collective variables for the first five PC axes of 26 residue lengths. Collective variables (eigenvectors) for the first five PC axes of 26 residue lengths are visualized by the vectors onto C_α atoms of a segment. The vector for the C_α atom of residue i is calculated as r _i = Σ_{i ≠ j}q _ij e^vk _ij λ _k ^1/2, where q _ij is the vector from residue i to j, e^vk _ij is the element of eigenvector of the PC axis k (v _k ) corresponding to the C_α-C_α pair between residue i and j, and λ _k is the eigenvalue of the PC axis k. Positive (blue) and negative values (red) are shown for elements of eigenvectors. The reference segment used in this figure is designed to clarify the difference between structural variables.