Figure 11.

35 GHz ¹H stochastic-field modulation detected (stochastic CW) ENDOR spectra of E₄(4H) in 70^Val→Ile/α−195^His→Gln MoFe protein, acquired at g = 1.991 and 1.964 (black) and summed simulations (red). The signal with ν₀(¹H) ± ~3 MHz, with both positive and negative features, represents transient responses from weakly coupled, more distant protons. Reproduced with permission ref 150. Copyright 2019 American Chemical Society.