Abstract. The maltose transport system of E. coli is composed of a periplasmic maltose-binding protein (MBP), the presumed transmembrane channel made up of MalF and MalG proteins, and two copies of the ATPase subunit, MalK.n extensively studied example of ABC transporters of Escherichia coli is the maltose transport system, which accumulates maltose and maltodextrins from the exter- *Corresponding author. Fax: (1) (510) 643-9290.