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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