Table 1.

Frequency occurrence of C-H⋯O interaction forming residues in different secondary structures

Residues	Helix (%)	Strand (%)	Turn (%)
A	53.7	33.5	7.8
R	38	41.5	21.3
N	29.6	29.6	27.2
D	37.8	30.5	31.7
C	44.8	37.5	17.5
Q	51.1	40.8	20.2
E	49.3	30.1	15.5
G	21.5	47.4	30.9
H	38.5	38.5	22.9
L	52.9	33.7	13.2
I	37.6	50.5	12
K	48	36.9	14.9
M	48.5	45.7	5.7
F	34	55.2	10.6
P	33.1	33.8	33.1
S	44.1	38	16.4
T	38.3	47.6	13.8
W	32	50.9	17
V	29.5	60.9	10
Y	29.1	53.2	17.5