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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 7.

Figure 7

2-D field-frequency plot of Davies ENDOR of X(Y122F) prepared with natural abundance (black solid lines) and 89 % 17O2 quenched at 4 s (red solid lines). Conditions: π pulse length = 80 ns, τ = 600 ns, repetition time = 50 ms, Trf = 40 μs, average microwave frequency = 34.96 GHz, T = 2 K.