Table 1. The g–tensor, hf–tensors (A, mT), line–width tensor (LW, mT), and the rotational θ angle of the α-carbon (°, deg) for the tyrosyl radical in Class Ia, Class Ib RNRs and the Y_D radical in photosystem II.

EPR-tensors	EBV R2	HSV1 R2	E. coli R2	Mouse R2	S. typhimurium R2	PS II YD
g 1	2.0080	2.0076	2.0090	2.0076	2.0089	2.0076
g 2	2.0043	2.0043	2.0046	2.0043	2.0043	2.0043
g 3	2.0021	2.0022	2.0022	2.0022	2.0021	2.0022
H3,5 Axx	−0.80/−0.70*	−0.28/−0.43*	−0.96	−0.91/−0.73*	−1.15	−0.91
H3,5 Ayy	−0.50/−0.40*	−0.28/−0.18*	−0.28	−0.44/−0.48*	−0.25	−0.26
H3,5 Azz	−0.30/−0.20*	−0.47−/0.64*	−0.70	−0.66/−0.58*	−0.71	−0.70
Hβ1 Axx	2.60	2.28	1.96	2.14	1.05	0.72
Hβ1 Ayy	1.80	2.07	2.12	1.90	0.74	1.05
Hβ1 Azz	1.40	1.78	1.96	2.15	0.95	0.72
Hβ2 Axx	0.40	0.39	0.18	0.95	<0.3	0.19
Hβ2 Ayy	0.30	0.25	−0.07	0.25	<0.3	0.19
Hβ2 Azz	0.30	0.28	−0.07	0.57	<0.3	0.51
LWx	0.38	0.33	-	0.45	0.58	-
LWy	1.0	0.33	-	0.35	0.53	-
LWz	1.1	0.33	-	0.44	0.37	-
θ	30	35	30	35	75	82
Ref.	This work#	[27], [33]	[31], [40], [65]	[33]	[34]	[22], [34]

*Non-equivalent H₃ and H₅ protons.

^#The proton (H) hfc signs were derived from the DFT analyses. The definition of the torsional angle θ was given in Scheme 1.