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. 2015 Apr 17;142(21):212424. doi: 10.1063/1.4917321

FIG. 8.

FIG. 8.

Schematic comparison of the IR active modes in antiparallel and parallel β-sheets. (Top) Schematic illustrating the spatial arrangement of amide groups in the two structures. (Bottom) Schematic of the ν and ν vibrational modes, color coding the CO vibrational phase for the individual amide sites (red/blue = + /).