Final answer:
During glycolysis, fructose-1,6-bisphosphate (FBP) is formed by the phosphorylation of D-fructose-6-phosphate by ATP, a reaction catalyzed by the enzyme Phosphofructokinase; ADP is another product of this reaction.
Step-by-step explanation:
D-Fructose-6-phosphate is phosphorylated at the 1 carbon position by ATP, with the assistance of the enzyme Phosphofructokinase, a transferase, to yield the product Fructose-1,6-bisphosphate (FBP). This step is considered the committed step of glycolysis due to its large negative free energy change (ΔG), making it effectively irreversible under cellular conditions. The enzyme phosphofructokinase plays a crucial role as a rate-limiting enzyme and is regulated by ATP levels, demonstrating end product inhibition when ATP levels are high.
The process also produces ADP as an additional product when ATP donates a phosphate. After the formation of fructose-1,6-bisphosphate, it is cleaved into two three-carbon sugars, dihydroxyacetone phosphate (DHAP) and glyceraldehyde-3-phosphate (G-3-P), by the enzyme aldolase in a subsequent step of glycolysis.