Fructose and glucose phosphorylating enzyme. ATP + D-hexose = ADP + D-hexose 6-phosphate + H(+) ATP + D-fructose = ADP + D-fructose 6-phosphate + H(+) ATP + D-glucose = ADP + D-glucose 6-phosphate + H(+) Carbohydrate metabolism; hexose metabolism. Carbohydrate degradation; glycolysis; D-glyceraldehyde 3-phosphate and glycerone phosphate from D-glucose: step 1/4. Expressed in roots, leaves, flowers, immature seeds, endosperm and seed coat. Expressed during flower development until 15 days after flowering. By glucose or fructose treatment in leaves. Belongs to the hexokinase family.