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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
MALDI ToF mass spectra in reflectron (A) and linear (B) of intact ECP nitrated peptide with DHB as matrix where the NO2 group of nitro tyrosine is photcehmical degraded due to UV laser radiation in MALDI ionization source.