Figure 4From: Calcium adsorption and displacement: characterization of lipid monolayers and their interaction with membrane-active peptides/proteinsTitration of calcium into the subphase underneath various monolayers. Calcium was titrated into the subphase underneath various monolayers. The results are shown exemplarily for DPG (), LPS R45 (), and LPS R60 (). The data points represent the mean intensities determined from 3 independent experiments. The lines represent fits of the respective titration curves applying Eq. 3. Calcium adsorption was measured in a buffer solution containing 5 mM HEPES at pH7. The net charges were calculated from mass spectrometric data.Back to article page