From: Tripeptide analysis of protein structures
Mean (α1,α3)
I
R
N
5.4
2
5
0
5.6
22
121
5.8
772
335
6
1744
276
40
6.2
1755
200
128
6.4
1052
209
89
6.6
330
113
23
6.8
52
27
9
7
8
7.2
1
7.4
7.6