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. 2015 Jun 8;10(6):e0129301. doi: 10.1371/journal.pone.0129301

Fig 7. Electron Paramagnetic Resonance (EPR)-spin trapping experiments.

Fig 7

a. An example of an EPR spectrum of superoxide anion created upon photoexcitation of imidazoacridinone 1330 alone and in the presence of NADH. b. Comparison of the coefficient a indicating the efficiency in superoxide anion creation derived from the EPR spectra of different irradiated imidazoacridinone derivatives (indicated in X-axis) in the presence and absence of NADH. Riboflavin was used as a positive control photosensitizer that efficiently generates superoxide anion in the absence of NADH.