Payne MA, Rao GS, Harris BG, Cook PF. Fructose 2,6-bisphosphate and AMP increase the affinity of the Ascaris suum phosphofructokinase for fructose 6-phosphate in a process separate from the relief of ATP inhibition. J Biol Chem. 1991 May 15; 266(14):8891-6.