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. Author manuscript; available in PMC: 2022 Sep 30.
Published in final edited form as: ACS Catal. 2021 Aug 3;11(16):10267–10278. doi: 10.1021/acscatal.1c02132

Fig. 8.

Fig. 8.

A) Amino acid oxidation sites detected in LC-MS/MS shown as green. Only one strand is highlighted for clarity. His oxidation is observed only in the Cu(I)-form, while the Cu(II)-form does not show His oxidation. Proposed structures of the CuII-OOH species generated with Cu(II)-peptide having unoxidized His (B) and with Cu(I)-peptide (C) bound to 2-oxo His. The structural differences between B and C likely dictate the spectral features of the CuII-OOH species generated with Cu(II) vs Cu(I)-forms of the peptide.