Figure 1. X-band EPR spectra of yeast iso-1-cytochrome c variants after the incubation with 4 mM hydrogen peroxide for different times, and rapid freezing in liquid nitrogen. A) WT16 variant. B) Y46F,Y48F,Y67F,Y74F,Y97F mutant. All spectra were recorded at = 9.390 GHz, 10 G modulation amplitude, 2 mW microwave power, and 100 kHz modulation frequency.