D-fructose + phosphate => beta-D-fructose 1-phosphate + H2O
d-fructose + phosphate => beta-d-fructose 1-phosphate + h2o
D-fructose + phosphate => beta-D-fructose 1-phosphate + H2O
d-fructose + phosphate => beta-d-fructose 1-phosphate + h2o