fructose to sorbitol as shown in the reaction scheme (Fig. 1). The
native enzyme contains the small coenzyme molecule NADP(H)
tightly bound (“macromolecularized”) to the active site of GFOR and
is regenerated during the reaction cycle. The great advantage of this
fact is that no additional technological steps for coenzyme retention
or regeneration are required. Both enzymes (invertase and GFOR)
together would allow to establish a (semi) continuous ultrafiltrationmembrane
reactor for the production of calorie (sugar) reduced
“dietetic” pineapple juice.