Figure 4.
Observed φ/ψ combinations for all residues. The observed φ/ψ distribution as a function of the indicated ranges of τ for residues in the Dunbrack database (excluding Gly and Pro). The data are overlaid on an average Ramachandran plot.8 The solid red lines enclose the “normally allowed” φ/ψ combinations and the dashed blue line indicates the “outer limit”. Residues within the bridge region are colored in green. The bridge region is defined by the area within the solid green lines. [Color figure can be viewed in the online issue, which is available at wileyonlinelibrary.com.]