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Different Two-Dimensional Infrared Spectral Signatures for 310- and α-Helix Octapeptides

Hiroaki Maekawa, Nien-Hui Ge, Claudio Toniolo, Alessandro Moretto, and Quirinus B. Broxterman

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Abstract

Femtosecond two-dimensional infrared spectroscopy is applied to the amide I modes of homo-octapeptides Z-[L-(αMe)Val]8-OtBu and Z-(Aib)8-OtBu in several organic solvents. Distinct cross-peak patterns that discriminate between 310- and α-helix structures are obtained.

© 2006 Optical Society of America

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