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Five molecular weight regions designated by the size exclusion elution profile and the corresponding molecular weight region of each fraction (Farrugia et al., 1998).
| Fraction | Molecular weight region |
|---|---|
| High molecular weight fraction (HMW) | >250,000 |
| Beta fraction | 150,000–250,000 |
| Alpha fraction | 50,000–150,000 |
| Sub alpha fraction | 20,000–50,000 |
| Low molecular weight fraction | 4,000–20,000 |
