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. 2015 Apr 7;54(17):2693–2708. doi: 10.1021/bi501489r

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Copyright © 2015 American Chemical Society

This is an open access article published under an ACS AuthorChoice License, which permits copying and redistribution of the article or any adaptations for non-commercial purposes.

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Continuous wave EPR spectra of the low- and high-spin states of Fe³⁺-HO2^O (black) and Fe³⁺-HO2^R (red). (A) Dispersion mode, Q-band EPR. Experimental conditions: Temperature = 2 K, microwave frequency = 34.9 GHz, Modulation amplitude 1 G, time constant = 64 ms, scan time = 480 s, number of points = 2000. (B) X-band EPR. Experimental conditions: Temperature = 10 K, microwave frequency = 9.388 GHz, modulation amplitude 10.15 G, time constant = 40.960 ms, scan time = 671.089 s, number of points = 4096. The arrows show the g-values for the high and low spin state of the heme.