Figure 4. Predicted variation in the enrichment ratio with k_mono and k_dimer as a function of the total area (as a percentage of the cell membrane area) and diameter of lipid rafts.

Results are shown for receptor densities of (A) 18% and (B) 1.8% of the cell surface area. For each pair of raft diameter and raft coverage, k_mono and k_dimer are varied from 10⁴ to 10⁷ s⁻¹ so as to include monomer, dimer and oligomer regimes. Diffusion coefficients in lipid raft and non-raft regions are 10⁻¹¹ cm²/s and 10⁻¹⁰ cm²/s respectively.