TABLE 2.
Single-pore conductance in the presence of nonelectrolytesa and pore filling
| Nonelectolyte, 20% (wt/vol) | Radius of nonelectrolyte (nm)b | Conductance ± HWHM (pS)d | Conductivity of solution (mS/cm) | F | F(%)c |
|---|---|---|---|---|---|
| None | 21.9 ± 3.5 | 102.5 | 0 | 0 | |
| Ethylene glycol | 0.26 | 18.1 ± 2.0 | 66.3 | 0.38 | 17.8 |
| Glycerol | 0.31 | 10.6 ± 2.5 | 68.6 | 2.16 | 100.0 |
| Arabinose | 0.34 | 10.6 ± 3.0 | 64.0 | 1.77 | 82.2 |
| Sorbitol | 0.39 | 16.9 ± 2.2 | 64.2 | 0.50 | 23.0 |
| Maltose | 0.5 | 20.8 ± 4.5 | 74.0 | 0.14 | 6.4 |
| PEG 300 | 0.6 | 20.2 ± 2.4 | 55.0 | 0.10 | 4.5 |
| PEG 400 | 0.7 | 18.3 ± 3.5 | 57.1 | 0.25 | 11.4 |
| PEG 1000 | 0.94 | 19.7 ± 3.4 | 56.0 | 0.13 | 6.2 |
a
n > 100.
b
The radii of the nonelectrolytes were reported previously (54).
c
The values of F(%) are normalized to the highest filling value observed in the presence of glycerol.
d
Measured in 20% (wt/vol) NE, 1 M KCl, and 10 mM HEPES at pH 6 under 80 mV.