TABLE 2.

Summary of redox potentials for various preparations of NR

Protein	Reduction potential (mV vs. SHE)a
Mo-heme fragment	−187 ± 1
Phosphorylated Mo-heme fragment + 14-3-3ω	−186 ± 1
Heme fragment	−186 ± 3
Heme-FAD fragment	−173 ± 2

^a Determined using indigo carmine as standardization dye (−116 mV at pH 7.0, 22 °C); n = 2.