Infrared Spectra and Protein Structure

IR studies, in this way the overlapping can be avoided since vibrational frequencies are usually shifted to lower values for proteins in D O as compared to H O solutions. The amide II band appears in the 1560-1510 cm range with strong-medium intensity. The other visible amide vibrational mode corresponds to the amide 111 band which falls in the 1300-1200 cm region. 

A strong band at about 3300 cm and a somewhat less strong one at about 3100 cm are referred to as the amide A and amide B bands, respectively [18, 33, 34]. The amide A band is attributed to the nNH vibration, whereas the amide B band is assigned to the first overtone of the amide II vibration, which is intensified by Fermi resonance with 

5 Vibrational Spectroscopy to Elucidate Structural Changes Induced by Thermal Treatment in Muscle Foods 

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