Table 1.

Normalized positional residue frequency at helix termini N1. The descriptor values for each amino acid (single letter code) are shown

Amino acid	Value
A	1.10
R	1.05
N	0.72
D	1.14
C	0.26
Q	1.31
E	2.30
G	0.55
H	0.83
I	1.06
L	0.84
K	1.08
M	0.90
F	0.90
P	1.67
S	0.81
T	0.77
W	1.26
Y	0.99
V	0.76