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Table 3 Hinge frequency of occurrence in various types of secondary structure.

From: Hinge Atlas: relating protein sequence to sites of structural flexibility

Secondary structure Hinge Residues (count) All residues (count) Hinge Residues (expected) HIsecondarystructure P-value
α-helix 75 18210 290 -0.587 1·8-67
3–10 helix 27 1937 31 -0.0577 0.27
π-helix 0 5 0   0.92
Extended      
conformation 160 11138 177 -0.0446 0.076
Isolated bridge 19 670 11 0.251 0.12
Turn 306 12472 199 0.188 5.9·10-17
Coil (none of the others) 286 10408 166 0.237 1.2·10-22
Total 873 54840