Table 6
Oxy Haemoglobin Helix Details: PDB entry 1A4F
Helix No. |
Helix ID |
Chain ID |
Initial residue |
Terminal residue |
Helix class |
| Helix 1 |
1 |
A |
4 |
17 |
Right-handed alpha |
| Helix 2 |
2 |
A |
21 |
35 |
Right-handed alpha |
| Helix 3 |
3 |
A |
37 |
42 |
Right-handed 310 |
| Helix 4 |
4 |
A |
53 |
70 |
Right-handed alpha |
| Helix 5 |
5 |
A |
76 |
88 |
Right-handed alpha |
| Helix 6 |
6 |
A |
95 |
112 |
Right-handed 310 |
| Helix 7 |
7 |
A |
119 |
135 |
Right-handed alpha |
| Helix 8 |
8 |
B |
5 |
17 |
Right-handed alpha |
| Helix 9 |
9 |
B |
20 |
34 |
Right-handed alpha |
| Helix 10 |
10 |
B |
36 |
45 |
Right-handed 310 |
| Helix 11 |
11 |
B |
51 |
55 |
Right-handed alpha |
| Helix 12 |
12 |
B |
58 |
76 |
Right-handed alpha |
| Helix 13 |
13 |
B |
81 |
94 |
Right-handed alpha |
| Helix 14 |
14 |
B |
100 |
121 |
Right-handed alpha |
| Helix 15 |
15 |
B |
124 |
142 |
Right-handed alpha |
The structure consists mainly of right-handed α-helices, with two and one shorter 310 helices in the A and B chains, respectively. The average lengths of α-helices were 14.4 and 14.28 residues for A and B chains, respectively, with an overall length for both chains of 14.34 residues. 310 helices were 5 and 17 residues long in the A chain and 9 residues long in the B chain. Average 310 helix length for both chains was 10.33 residues.