Characterization of the Site‐Specific Acid‐Base Equilibria of 3‐Nitrotyrosine

The complete macro‐ and microequilibrium analyses of 3‐nitrotyrosine, a biomarker of oxidative stress damage, are presented for the first time. The protonation macroconstants were determined by 1 H‐NMR‐pH titration, while microconstants were elucidated by a combination of deductive and NMR methods, in which properties of the methyl ester derivative as an auxiliary compound were also studied. Combination of the NMR‐pH characterization of the...