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. Author manuscript; available in PMC: 2016 Apr 25.
Published in final edited form as: J Am Chem Soc. 2015 Jul 15;137(29):9302–9314. doi: 10.1021/jacs.5b03524

Table 1. Spin-Hamiltonian Parameters for G4DFsc and 3His-G4DFsc(Mut3).

G4DFsc 3His G4DFsc+4-AP 3His+4-AP
−J (cm−1) 3–4 1–3 <1 <1
D1 (cm−1) 5–10 10–15 5–15 5–15
(E/D)1 0.33 0.33 0.33 0.33
D2 (cm−1) −7 to −14 −10 to −15 −5 to −15 −5 to −15
(E/D)2 0.15 0.33 0.33 0.33