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. Author manuscript; available in PMC: 2011 Mar 2.
Published in final edited form as: Langmuir. 2010 Mar 2;26(5):3423–3432. doi: 10.1021/la902888y

Figure 4.

Figure 4

Ratio of 84/86 characteristic K/L peaks of a) LKα14 and b) LKβ15 adsorbed at different concentrations onto methyl and carboxylic-acid terminated SAMs plotted against approximate N atomic % in the organic layer (XPS). The ratios indicate that the leucine residues interact with the methyl surface and the lysines interact with the carboxyl SAM for the LKβ15 peptide. The orientation of LKα14 is not discernable using this technique. Error bars represent the standard deviation for each data point, and are present for each point although some are too small to be visible.