Figure 2. Kinetics of diformazan formation in 0.2 M carbonate buffer, pH 10.8, containing 0.075 mM NBT in the presence of: 1 - 1.5 mM NAD and 2 – continued recording; 3 - 1.5 mM NADH; 4 - 1.5 mM NADP. Temperature 22°C.