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. Author manuscript; available in PMC: 2016 Dec 16.
Published in final edited form as: J Am Chem Soc. 2015 Dec 4;137(49):15558–15566. doi: 10.1021/jacs.5b10763

Figure 2.

Figure 2

(Black) Davies ENDOR spectra of the 14NIm coordinated to the Fe(III) ion for RNR-X taken at 10.0 G intervals across the EPR envelope of X(Y122F). (*) The feature in the vicinity of 15 MHz that appears as g approaches g1, is a proton harmonic. (Red) Simulations using hyperfine and quadrupole parameters given in Table 1.