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Definitions of variables that appear in the model
| Variable | Meaning | Units |
|---|---|---|
| F(x, t) | Actin filament length density. | μm/μm |
| B(x, t) | Density of actively growing barbed ends. | #/μm |
| A(x, t) | Arp2/3 concentration. | μM |
| C, R, ρ(x, t) | Concentration of active Cdc42, Rac, and Rho. | μM |
| Ci, Ri, ρi(x, t) | Concentration of inactive Cdc42, Rac, and Rho. | μM |
| P1, P2, P3(x, t) | Concentration of PIP1, PIP2, and PIP3. | μM |
| xedge | Position of leading edge. | μm |
