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Parallel mode X-band EPR spectrum of 5′ (7.5 mM) recoded at 10 K (black) and the simulation (red). The inset shows signal intensity times temperature versus temperature of g ∼ 8 signal (dots) and a fit with the corresponding Boltzmann function (red line). Frequency 9.396 GHz, power 0.2 mW, and modulation 100 kHz/0.75 mT.
