Table 3.
Distribution of proteins of human mucosal fluids (Ali et al., 2011; Schenkels et al., 1995).
| Fluid type Protein type |
Saliva | Bronchial Mucus | Nasal Mucus | Airway secretions |
|---|---|---|---|---|
| Mucins (% of total protein) | >15% | >15% | >15% | >15% |
| Acidic proline-rich proteins (% of total protein) | >15% | ND | ND | ND |
| a-Amylase (% of total protein) | >15% | <1% | <1% | <1% |
| Basic proline-rich proteins (% of total protein) | 5–15% | <1% | <1% | 1–5% |
| Basic proline rich glycoprotein (% of total protein) | 5–15% | ND | ND | ND |
| Secretory Immunoglobulin A (% of total protein) | 5–15% | ND | >15% | >15% |
| Cystatins (% of total protein) | 1–5% | ND | <1% | ND |
| Statherin (% of total protein) | 1–5% | <1% | <1% | <1% |
| Immunoglobulin G (% of total protein) | <1% | <1% | <1% | <1% |
| Extra-parotid glycoprotein (% of total protein) | <1% | ND | <1% | ND |
| Histatins (% of total protein) | <1% | ND | ND | ND |
| Lysozyme (% of total protein) | <1% | >15% | >15% | >15% |
| Kallikrein (% of total protein) | <1% | ND | <1% | ND |
| Lactoferrin (% of total protein) | <1% | >15% | >15% | >15% |
| Lactoperoxidase (% of total protein) | <1% | ND | <1% | ND |
| Haptocorrin (% of total protein) | <1% | ND | <1% | ND |
| B-Microseminoprotein (% of total protein) | <1% | 5–15% | <1% | <1% |
| Immunoglobulin M (% of total protein) | <1% | <1% | 5–15% | <1% |
| Albumin (% of total protein) | <1% | <1% | <1% | ND |
| Zn-a2 glycoprotein (% of total protein) | <1% | ND | ND | ND |