Table 1. Values for the Kd’s determined for the interactions between the CYP2B4-FM variants on the proximal side of the protein and CPR by fluorescence titration.
CYP2B4-FM variant | Kd |
---|---|
(L420C)FM | 0.13±0.02 |
(L270C)FM | 0.68±0.09 |
(R133C)FM | 0.49±0.05 |
(V267C)FM | 0.73±0.07 |
The fluorescence emission of the 0.05 µM CYP2B4FM proximal variants were recorded in the presence of 0.1 mg/ml DLPC and 50 mM potassium phosphate, pH 7.4, at 22 ° C. The CYP2B4FM samples were then reconstituted with increasing concentrations of CPR. The resulting titration curves were fit to the Michaelis-Menten equation from which Kd’s were determined.