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. 2019 Jul 23;9:10636. doi: 10.1038/s41598-019-47011-z

Figure 2.

Figure 2

Peptide used the current study and the absorption spectra at terahertz region before and after the fibrillation. (A) Amino acid sequence of calcitonin hormone. Five-residue peptide for the fibrillation was indicated in bold. (B) Fibril and Pre-Fibril (peptide before fibrillation) dried on a stainless steel base. Black bar: 4 mm. (C) Infrared absorption spectra. Red: pre-fibril, blue: fibril. Arrows indicate the irradiation wavelengths (74 and 80 μm) of the FEL.