... system and, in this function, is one of the key players of cataboliterepression. Mathematical modelling of signal transduction and gene expres-sion of the enzymes involved in the transport of ... – a comparison of modelling approachesAndreas Kremling, Sophia Kremling and Katja BettenbrockSystems Biology Group, Max Planck Institute for Dynamics of Complex Technical Systems, Magdeburg, ... dynamics of extracellular components); EI, enzyme I (protein,component of the PTS); EIIA, enzyme IIA (protein, component of the PTS, ‘output’ of the system as it activates the synthesis of cAMP);EIIBC...