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180
o
β-sheet
Left-
handed
α
-helix
ψ
0
o
Right-
handed
α
-helix
-180
o
-
-180
o
0
o
180
o
φ
Figure 3 Ramachandran Plot. Sterically allowed regions are patterned, outlying
regions are grey.
180
o
ψ
0
o
-180
o
-180
o
0
o
180
o
φ
Figure 4. Revised steric map (adapted from Ho
et al.,
[6]). Sterically allowed
regions are dark grey. Outlying regions that are only excluded by one steric clash are
light grey.
β
,
α
L
and
α
R
regions are patterned. Sterically restricted regions are white
