Fig. 1. Comparison of the X-band EPR spectra of the nitrite complexes of different NPs recorded at 10 K, with the simulated spectra shown in dashed lines (see Fig. S2† for g-values used for the simulations). For comparison, the positions of the g-values of NP4 are indicated with dashed vertical lines. Note that in all the cases a small fraction of the high-spin signal was observed (*), possibly due to a water-bound ferriheme complex.
