Figure 1.
NAMPT activity as a function of pH for the ATP-coupled NMN synthesis reaction (A). Concentrations fixed at 1 µM [14C]NAM, 200 µM PRPP, 1 mM ATP and 5 mM MgCl2 with 30 nM enzyme. NAMPT ATPase activity as a function of pH (B). Concentrations were fixed at 2 mM ATP and 5 mM MgCl2 with 0.75 µM enzyme.