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. Author manuscript; available in PMC: 2023 Jan 23.
Published in final edited form as: Methods Enzymol. 2022 Mar 18;666:297–314. doi: 10.1016/bs.mie.2022.02.003

Fig. 2.

Fig. 2

X-band CW EPR spectra, displayed in the first-derivative mode, of OR-derived peptides obtained at pH7.45 and 77K. The grid markers identify the four hyperfine lines from the copper I = 3/2 nucleus. These spectra suggest the existence of two distinct species, initially referred to as Component 1 and Component 2.