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Figure 3
Representation of the three-dimensional DipSpace. (a) Joint distribution of pc1 (extension) and pc2 (twist), pc1 (extension) and pc3 (bending), and pc2 (twist) and pc3 (bending). The two main lobes are marked by dashed lines. Distribution of (b) α-helices and extended strands, (c) turns, β-bridges, π-­helices and 310-helices, as annotated by DSSP, and (d) glycine and pre-proline residues (the identity corresponds to the middle Cα atom of the dipeptide unit).

IUCrJ
Volume 4| Part 5| September 2017| Pages 657-670
ISSN: 2052-2525
https://doi.org/10.1107/S2052252517008466