| 13 transmembrane subunits |
| A - Tilt: 3° - Segments: 1(8-32), 2(52-75) |
| B - Tilt: 4° - Segments: 1(8-32), 2(53-75) |
| C - Tilt: 6° - Segments: 1(8-31), 2(53-75) |
| D - Tilt: 8° - Segments: 1(8-31), 2(55-77) |
| E - Tilt: 8° - Segments: 1(7-31), 2(55-78) |
| F - Tilt: 8° - Segments: 1(7-31), 2(55-78) |
| G - Tilt: 8° - Segments: 1(7-31), 2(55-78) |
| H - Tilt: 7° - Segments: 1(8-31), 2(53-77) |
| I - Tilt: 7° - Segments: 1(8-32), 2(53-75) |
| J - Tilt: 5° - Segments: 1(8-32), 2(52-75) |
| K - Tilt: 3° - Segments: 1(8-32), 2(52-75) |
| L - Tilt: 4° - Segments: 1(8-32), 2(51-76) |
| M - Tilt: 10° - Segments: 1(101-124), 2(142-166), 3(201-223), 4(241-262) |