Molecular docking of FMN-binding domain with SbC4H1.A, stereo view of SbCPR2b FMN-binding domain (light blue) docked to SbC4H1 (yellow, PDB ID: 6VBY). The rat CPR FMN-binding domain (purple, PDB ID: 1AMO) docked to SbC4H1 at the same position was superimposed. B, stereo view of SbCPR2b FMN-binding domain (light blue) docked to SbC4H1 (yellow, PDB ID: 6VBY). The ATR2 FMN-binding domain (green, PDB ID: 5GXU) docked to SbC4H1 at the same position is superimposed. C, stereo view of SbCPR2b FMN-binding domain (light blue) docked to SbC4H1 (yellow, PDB ID: 6VBY) is superimposed with the heme (orange) domain and FMN-binding domain (dark blue) of the cytochrome P450 (BM-3) (PDB ID: 1BVY). The molecular docking was performed using the “PatchDock” algorithm (67), and the FMN-binding domain model of SbCPR2b was built with Phyre2 server (68). CPR, cytochrome P450 reductase.