Figure 4.

Evolution of the percentage of abundance of the main secondary structure motifs found in the deconvolution of the amide I band, along the days of ozone exposure (dashed lines are guide for the eyes). The α-helix conformation experiments a continuous decline when the ozone exposure time increases, the most pronounce decrement corresponds with the abrupt increase of the β-sheet conformation. The β-turn type slightly increases until 30 days and then decreases with a similar tendency to the α-helix motif. Unordered structure type shows a random tendency but almost disappears after 60 days of ozone exposure, when the β-sheet conformation is the most abundant.