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Sagot :
To predict alpha helices in the hemoglobin sequence:
1. Identify Proline Residues:
- Proline (P) cannot be in an alpha helix: found at positions 4, 23, and 48.
2. Identify Glycine Residues:
- Glycine (G) can be in an alpha helix but typically no more than twice per helix: found at positions 16, 17, 25, 26, 35, 50, 51, and 55.
Predicted Alpha Helices:
1. First Helix: From the start (M1) to L3 (before P4).
2. Second Helix: From D6 to G17 (no prolines and acceptable glycine count).
3. Third Helix: From A28 to T47 (no prolines and acceptable glycine count).
Thus, there are three predicted alpha helices in the sequence:
1. M1-L3
2. D6-G17
3. A28-T47
1. Identify Proline Residues:
- Proline (P) cannot be in an alpha helix: found at positions 4, 23, and 48.
2. Identify Glycine Residues:
- Glycine (G) can be in an alpha helix but typically no more than twice per helix: found at positions 16, 17, 25, 26, 35, 50, 51, and 55.
Predicted Alpha Helices:
1. First Helix: From the start (M1) to L3 (before P4).
2. Second Helix: From D6 to G17 (no prolines and acceptable glycine count).
3. Third Helix: From A28 to T47 (no prolines and acceptable glycine count).
Thus, there are three predicted alpha helices in the sequence:
1. M1-L3
2. D6-G17
3. A28-T47
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