Average single-channel conductance, G, of OmpW of <i>C</i>. <i>crescentus</i> in different salt solutions and radii, hydrated radii and limiting molar conductivity of the cations.

The membranes were formed from diphytanoyl phosphatidylcholine dissolved to 1% in n-decane. The aqueous solutions were used unbuffered and had a pH of 6 unless otherwise indicated. The applied voltage was 20 mV, and the temperature was 20°C. The average single-channel conductance, G (± SD), was calculated from at least 80 single events by averaging over all fluctuations or using a Gaussian distribution of the single-channel conductance (1 M KCl). The ionic radii of the ions were taken from literature sources [38–40]. The radii of the hydrated cations were calculated from the limiting conductivities using the Stokes equation and were taken from [37]. The data for the limiting conductivities of the different ions were taken from [41]. The fact that the hydrated ion radius (Stokes radius) is in some cases smaller than the crystal radius is a phenomenon that is known from the literature (see ref. [42]). Average single-channel conductance, G, of OmpW of C. crescentus in different salt solutions and radii, hydrated radii and limiting molar conductivity of the cations.