sentences:  The defective exports of the mutant MBPs are consistent with the alpha-helical conformation and hydrophobic interactions of the signal peptide in its interaction with the translocon motor protein SecA.The "malE" gene, coding for MBP, belongs to the Mal regulon of "E. coli", which consists of ten genes whose products are geared for the efficient uptake and utilization of maltose and maltodextrins.All the gene involved in the transport of maltose/maltodextrin, including "malE", are clustered in the "malB" region of "E. coli" and organized in two divergent operons