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Comparison of molecular weight and molecular radii with apparent permeability of paracellular model compounds[63,64]
| Markers | Molecular weight | Stokes radius (Å) | Hydrodynamic radius (Å) | P app (×10−5 cm/s) |
|---|---|---|---|---|
| Urea | 60 | 1.7 | 1.8 | 2.43 ± 0.155 |
| Mannitol | 182 | 3.6 | 4.3 | 1.52 ± 0.069 |
| Sucrose | 342 | 4.6 | 5.2 | 1.17 ± 0.008 |
| Inulin | 5000 | 13.9 | 10 | 0.754 ± 0.030 |
| PEG-4000 | 4000 | 16.4 | 15.9 | 0.357 ± 0.010 |
