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. Author manuscript; available in PMC: 2010 May 1.
Published in final edited form as: Biochim Biophys Acta. 2008 Nov 14;1787(5):384–392. doi: 10.1016/j.bbabio.2008.11.003

Fig. 7.

Fig. 7

EPR signals of the semiquinone radical in Complex I at 180 K. The systems contained 30 mg/ml of SMP in 300 μl, 150 μM CoQ1. The ubisemiquinone formation was initiated by the addition of 150 μM NADH. Spectra were obtained at a microwave frequency of 9.4121 GHz, obtaining a value of g=2.005 for the semiquinone radical.