The (13)C amide I band is still sensitive to conformation change when the regular amide I band cannot be distinguished at the typical position in H2O.

The attenuated total reflection technique was utilized to obtain FTIR spectra of (13)C-labeled peptides with a sequence of (AAAAK)4AAAAY in H2O. The regular amide I band was not at the typical position as reported in globular proteins, whereas the (13)C amide I band was still sensitive to conformation change.

Citation

Shanghao Li, Joseph Dale Combs, Olaa Eid Alharbi, Jing Kong, Chengshan Wang, Roger M Leblanc. The (13)C amide I band is still sensitive to conformation change when the regular amide I band cannot be distinguished at the typical position in H2O. Chemical communications (Cambridge, England). 2015 Aug 14;51(63):12537-9

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PMID: 26153570

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