Complex sentence: In the reductase domain the electrons move from NADPH to FAD to FMN to Fe2 +, and then to O2, NADPH moves to the reductase domain of the nitric oxide synthase and oxidized to NADP +, and FAD is reduced to FADH2.
Split into simpler sentences: In the reductase domain the electron moves from NADPH to FAD to FMN and then to Fe2 +, and then to O2. The NADPH goes to the reductase domain of the nitric oxide synthase in which NADPH is oxidized to NADP + while FAD reduced to FADH2.