Table 1. The number of aligned helix pairs in each class, and occurrence of proline within that class.
| Membrane | Soluble | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| CK | CS | NC | other | total | CK | CS | NC | other | total | |
| All | 1189 | 1806 | 789 | 320 | 4104 | 40190 | 481388 | 88390 | 19556 | 629524 |
| % | 29.0 | 44.0 | 19.2 | 7.8 | 100.0 | 6.4 | 76.5 | 14.0 | 3.1 | 100.0 |
| PP | 14.4 | 0.9 | 1.9 | 1.8 | 19.0 | 1.3 | 0.0 | 0.4 | 0.1 | 1.8 |
| P- | 4.1 | 2.7 | 7.7 | 1.1 | 15.6 | 0.9 | 0.5 | 5.7 | 0.4 | 7.5 |
| -P | 4.4 | 0.2 | 1.3 | 0.8 | 6.7 | 0.8 | 0.1 | 0.3 | 0.0 | 1.2 |
| - - | 6.1 | 40.2 | 8.4 | 4.1 | 58.7 | 3.3 | 75.9 | 7.7 | 2.6 | 89.5 |
The helix pair classes conserved kinked (CK), conserved straight (CS), not conserved (NC) and other are defined in Fig 1. The frequency of proline in each class is given as a percentage of the total number of pairs. PP: proline in both helices; P-: proline in the helix with the larger kink angle; -P: proline in the helix with the smaller kink angle; - -: proline in neither helix. All percentages are rounded to one decimal place.