Fig. 4. Double-reciprocal plots for the inhibition of 50 nM βPGM with varying concentrations of βG1CP (A) and βG1CF_SP (B), along with 2 mM MgCl₂, 0.5 mM NADP⁺, 5 U mL^–1 G6PDH, 150 μM fructose-1,6-bisphosphate, and βG1P in 50 mM HEPES pH 7.2. ▲ 0 μM, × 2 μM, ◆ 5 μM, ■ 10 μM, 20 μM.