sentences:  Transcription activation requires the binding of adenosine triphosphate (ATP) and maltotriose to MalT and the binding of cyclic AMP to the dimer of CRP.The unliganded form of MalT is monomeric whereas its liganded form, in the presence of ATP and maltotriose, is oligomeric.One suspects that commercial maltose contains enough maltotriose for the induction of the Mal regulon.