*4.2. Mass Spectrometry Analysis*

MALDI-TOF MS spectra of the peptide fractions obtained by RP-HPLC were recorded using an Ultra Flex III MALDI-TOF/TOF mass spectrometer (Bruker, Bremen, Germany) with a nitrogen laser (Smart Beam, 355 nm), reflector, and the potential LIFT™ tandem modes of operation. Sinapinic acid was used as a matrix. An external calibration was employed using a peptide sample [56] with *m*/*z* 6107 Da and its doubly-charged variant at *m*/*z* 3053 Da.
