- Regulation of glycogen synthesis and glucose utilization in Escherichia coli during maintenance of the energy charge. Quantitative correlation of changes in the rates of glycogen synthesis and glucose utilization with simultaneous changes in the cellular levels of both glucose 6-phosphate and fructose 1,6-diphosphate. Dietzler, D.N., Leckie, M.P., Sternheim, W.L., Ungar, J.M., Crimmins, D.L., Lewis, J.W. J. Biol. Chem. (1979)