The model describes thiamine ABC transporter, permease protein in bacteria. The protein belongs to the larger ABC transport system. It consists of atleast three components: the inner mebrane permease; thiamine binding protein; an ATP-binding subunit. It has been experimentally demonstrated that the mutants in the various steps in the de novo synthesis of the thiamine and the biologically active form, namely thiamine pyrophosphate can be exogenously supplemented with thiamine, thiamine monophosphate (TMP) or thiamine pyrophosphate (TPP). [Transport and binding proteins, Other]