x1 = PIP2_PHGFP_PM
x2 = PH_GFP_Cyt
x3 = PI_PM
x4 = stim_PM
x5 = IP3_PHGFP_Cyt
x6 = PIP2_PM
x7 = PIP_PM
x8 = DAG_PM
x9 = hv_Cytosol
x10 = IP3X_Cytosol
x11 = PLC_PM
x12 = PLC_act_PM
x13 = IP3_Cyt