From 2007.igem.org

Next, to consider the number of cells, the differential equations for multiple cells were given as

where N indicates the number of the cells.

In the steady state,time derivatives are zero.As a result,the nullclines of this system were derived as

and then substitute the third equation into the second

To analyze the equations, the values of parameters in the right table were used.The phase plane are shown in Fig●

Step.4 >> Step.5