alpha-D-glucose 6-phosphate <=> beta-D-fructose 6-phosphate
alpha-d-glucose 6-phosphate <=> beta-d-fructose 6-phosphate
alpha-D-glucose 6-phosphate <=> beta-D-fructose 6-phosphate
alpha-d-glucose 6-phosphate <=> beta-d-fructose 6-phosphate