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. Author manuscript; available in PMC: 2014 Aug 15.
Published in final edited form as: Phys Chem Chem Phys. 2013 Aug 14;15(30):12516–12524. doi: 10.1039/c3cp50880c

Figure 3.

Figure 3

: Left: Schematic drawing of the model lysine-leucine peptide LKα14 adsorbed onto a polystyrene surface. The leucine side chains interact with the hydrophobic surface. Right: SFG spectrum of Leu 12 (labeled red) after that side chain has undergone site directed deuterium substitution for structural analysis studies. The orientations of all leucine side chains (sticks) were determined using a combination of SFG and solid-state NMR.60 The lysine residues (lines) are less ordered than the leucines and interact with the surrounding water molecules.