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Post-translational modifications (PTM) such as O-phosphorylation of tyrosine (Tyr) and serine (Ser) and 3-nitration of Tyr amino acid residues of proteinaceous molecules were successfully detected by electrochemistry with the amyloid-beta (1–16) peptide (Aβ16) as an example. The detection strategy was based on the effects of Tyr or Ser O-phosphorylation and Tyr 3-nitration on electrochemical activity...
Electrochemical oxidation of the synthetic peptide Aβ(1–16), representing the metal-binding domain of Alzheimer’s human amyloid-β peptide, was investigated on carbon screen printed electrodes. The electrochemical behavior of Aβ(1–16), determined by the oxidation of the single Tyr-10 residue, was compared with that of free Tyr and with Tyr-lacking rat Aβ(1–16). The Aβ(1–16) oxidation signal detected...
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