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Table 4 Estimation of the diameter of the cell wall pore of C. urealyticum

From: Identification and characterization of smallest pore-forming protein in the cell wall of pathogenic Corynebacterium urealyticum DSM 7109

Non-electrolytes (Nes)

Mr (g/mol)

r (nm)

G (pS)

X (mS cm− 1)

None

–

–

1750 ± 250

110.3

Ethylene glycol

62

0.26

800 ± 100

57.2

Glycerol

92

0.31

500 ± 100

49.1

Arabinose

150

0.34

700 ± 100

63.7

Sorbitol

182

0.39

800 ± 100

57.8

Maltose

360

0.50

800 ± 100

73.8

PEG 300

300

0.60

1000 ± 100

45.5

PEG 400

400

0.70

1000 ± 100

46.4

PEG 600

600

0.80

1000 ± 100

54.1

PEG 1000

1000

0.94

1300 ± 100

49.5

PEG 2000

2000

1.22

1700 ± 250

43.6

  1. The aqueous phase contained 1 M KCl and 20% (w/v) of different non-electrolytes. The non-electrolytes were used to determine the diameter of the cell wall pore. The molecular masses and the hydrodynamic radii (r) of the non-electrolytes are given together with the conductance of the channel (G ± SD) in the corresponding solution and the aqueous conductivity. X is the aqueous conductivity of the salt solutions with and without the NEs and was taken from ref. [62]. The membrane voltage was 20 mV; T = 20 °C