The isoelectric point (pI) of myoglobin is between 6.8 and 7.4.
Myoglobin is considered a neutral reference protein based on its pI value. To provide context, let's compare myoglobin's pI to other proteins mentioned in the reference:
- Myoglobin: pI 6.8-7.4
- Cytochrome c: pI 9.6 (basic protein)
- beta-Lactoglobulin: pI 5.4 (acidic protein)
- Ovalbumin: pI 5.1
Here's a table summarizing the pI and molecular weight (Mr) of these proteins:
| Protein | pI | Mr (kDa) |
|---|---|---|
| Cytochrome c | 9.6 | 11.7 |
| beta-Lactoglobulin | 5.4 | 18.4 |
| Myoglobin | 6.8-7.4 | 17.8 |
| Ovalbumin | 5.1 | 45.0 |
