A phosphorylated six-carbon sugar
formed in the second step of glycolysis
by the action of phosphoglucose isomerase on glucose 6-phosphate. In the third step, fructose 6-phospate and ATP
are used to create fructose 1,6-biphosphate, ADP and a free hydrogen
with the aid of phosphofructokinase.
From the BioTech Dictionary at http://biotech.icmb.utexas.edu/. For further information see the BioTech homenode.