Action modes of malPQ isolated from Escherichia coli K12

The gene of malPQ encoding 4-α-glucanotransferase (amylomaltase) is located in the malPQ operon of Escherichia coli K12. e reactions of the enzyme with several types of carbohydrate were carried out under the optimal conditions in an effort to understand the function of MalPQ enzyme in maltodextrin and glycogen metabolism of E. coli.