From 2007.igem.org

• • • • • • • • • • MODEL NAME

Model of the Division PoPer Proof of Concept Construct of Edinburgh iGEM 2007 Team

• • • • • • • • • • MODEL NOTES

The model represents a simple construct with a constitutive on promoter placed between two dif sites.

• • • • • • • • • • MODEL STATES

d/dt(YFP) = YFPexp * ForwardPhase(time) - YFPdeg* YFP

d/dt(GFP) = GFPexp * BackwardPhase(time) - GFPdeg * GFP

YFP(0) = 0 GFP(0) = 0

• • • • • • • • • • MODEL PARAMETERS

YFPexp = 0.01 GFPexp = 0.01 GFPdeg = 0.001 YFPdeg = 0.001

• • • • • • • • • • MODEL VARIABLES

• • • • • • • • • • MODEL REACTIONS

• • • • • • • • • • MODEL FUNCTIONS

• • • • • • • • • • MODEL EVENTS

• • • • • • • • • • MODEL MATLAB FUNCTIONS

function [result] = ForwardPhase(t) FlippingTime=10; DivisionTime=40; temp=0; temp = mod(t,2*DivisionTime+2*FlippingTime); if temp < (DivisionTime)

 result=1;                                                                                                                                  

else result=0; end return

function [result] = BackwardPhase(t) FlippingTime=10; DivisionTime=40; temp=0; temp = mod(t,2*DivisionTime+2*FlippingTime); if temp > (DivisionTime+FlippingTime)

  if temp < (2*DivisionTime+FlippingTime)                                                                                                   
     result=1;                                                                                                                              
   else result=0;                                                                                                                           
  end                                                                                                                                       
else result=0;                                                                                                                              

end return