Table 7.

Analytical techniques/assays to detect Phe oxidation products with the corresponding analytical techniques and relevant references.

Amino Acid Residue	Oxidized Amino Acid Residues	Analytical Technique	Reference
Phe	o-Tyr, m-Tyr	see Tyr	Orhan et al. (2004), Wheeler et al. (1969), Martin- Tornero et al. (2019) [316,317,318]