Parameters of the mathematical model for thymocyte migration and differentiation^*.

The value of the parameters were ultimately determined after fitting the model with experimental results [24]. The values of some parameters (thymocyte speed; rate of cell entry into the thymus, division rate of DN and of DP cells), can change depending on the mathematical rule of evolution and on the dynamic of the system. For example, 0.18 division/min occurs in the beginning of DN expansion, but after the steady state is achieved, the model finds 13 divisions per day. *Each lattice update is equivalent to ∼1.61 minutes.