2.3.5. Spectra Analysis

The UV spectrum of CYP (0.5 mg/mL) was obtained on a spectrophotometer (TU-1900, Pgenenal, Beijing, China) within the scanning range of 190–400 nm. The FT-IR spectrum of CYP was measured with a Nicolet 5700 FT-IR spectrometer (Thermo Electron, Madison, WI, USA) within the 4000–400 cm−<sup>1</sup> wavenumber region [33].
