... that the former is closer to a SIM than the latter. Using these plots and having measured the concentration of EIIAÆP, the investigator can read the values of the remaining eight concentrations off the ... ½HPrtot¼~z2þ~z3þ~z8þ~z9;½EIIAtot¼~z3þ~z4þ~z10þ~z11;½EIICBtot¼~z4þ~z5þ~z12þ~z13ð22ÞUsing these, we can express~z6,~z8,~z10 and ~z12 in terms of the remaining state variables, substitute these expressions in the original model, and obtain the nine-dimensionalODE ... approaches aiming at understanding the complexinteractions in living cells is increasing.Materials and methods The PTS modelHere, we present the PTS model [8] in detail, list the linearconservation...