. 2015 Nov 9;291(3):1162–1174. doi: 10.1074/jbc.M115.688457

TABLE 1.

EPR simulation parameters for Mo^V and reduced [2Fe-2S] and [4Fe-4S] centers of FdsABG

Center	g tensors				Molybdenum coupling constants^a			¹H coupling constants^a			e-e^a
Center	g₁	g₂	g₃	g_ave	A₁	A₂	A₃	A₁	A₂	A₃	e-e^a
Mo^V_H, 150 K^b^,^c	2.009	2.001	1.992	2.000	138^d	82	45	18	21	18
Mo^V_D, 150 K^b^,^c	2.009	2.001	1.992	2.000	139	84	49
Mo^V_D, 60 K^b^,^c	2.009	2.001	1.991	2.000	139	85	44
Mo^V_D, 20 K^b^,^c	2.009	2.001	1.992	2.001	138	84	46				19
Fe/S1, 100 K^c	2.001	1.946	1.918	1.955
Fe/S2, 60 K^c	2.017	1.947	1.933	1.966
Fe/S3, 20 K^c	2.044	1.937	1.898	1.959							19^d
Fe/S4, 20 K^e	2.095^c	1.888	1.862	1.948
Fe/S4′, 20 K^e	2.095^c	1.885	1.882	1.954

^a In MHz; in the absence of multifrequency data, coupling constants are approximate.

^b Euler angles (α = 10.8°, β = 0.2°, γ = 152.5°) were fixed during simulations; in the absence of multifrequency data, angles are approximate.

^c g tensor uncertainty, ± 0.001.

^d Fixed during simulations.

^e g tensor uncertainty not determined (see text).