pH Dependence of Kinetic Parameters for the SDH Reaction from S. cerevisiae in the Direction of Lysine Formation. Data were obtained at 25 °C for V2/Et (A), V2/KNADHEt (B), V2/Kα-KgEt (C), and V2/KLysEt (D). The points shown are the experimentally determined values, while the curves are theoretical based on fits of the data using eq. 9 for V2/KNADHEt and V2/Kα-KgEt, eq. 6 for V2/KLysEt, while the V2/Et profile were fitted as described in Methods.