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Table 2 Calculated surface charge densities and planes of shear of the S. Minnesota LPS. The areas per molecule A were calculated according to Snyder et al [29], using the respective amounts of fatty acids determined from mass spectrometric data. The charge densities σ were calculated from A and the net negative charges given in Tab. 1. d1 and d2 represent the distances of the planes of shear from the aggregate surface taking into account 1 or 2 charged planes, respectively.

From: Calcium adsorption and displacement: characterization of lipid monolayers and their interaction with membrane-active peptides/proteins

Strain A/nm2 σ/e0 nm-2 d1/nm d2/nm
LPS R595 1.18 3.04 0.40 -
LPS R4 1.29 3.11 0.23 -
LPS R7 1.26 3.26 0.20 -
LPS Rz 1.05 5.04 0.36 1.26
LPS R5 1.26 3.26 0.35 -
LPS R345 1.19 4.02 0.24 1.04
LPS R60 1.04 5.75 0.42 1.38