Figure 4. Distribution of superhelical radius.

Stacked bar plots show the the overall distribution of R₀ (total histogram) as well as contributions to it from structures of parallel orientation (dark gray bars) and anti-parallel or mixed orientation (light gray bars). A) The distribution of R₀ is multi-modal with peaks corresponding to different oligomerization states. B)-C) Show distributions of R₀ for dimers and trimers, respectively, and D) combines tetrameric and pentameric cases (of the four pentameric structures, all are of parallel orientation). The median values of the distributions are 4.85 Å for dimers, 6.36 Å for trimers, 7.30 Å for tetramers and 8.59 Å for pentamers.