Figure 9. Concentration dependence of surface and internalized receptors and ligand-receptor complexes on cell density.

RS, RI, LRS, and LRI concentrations computed as a function of the radius of the extracellular medium per cell, . When is expressed in the cell density-values are given by cells/ml. Internalized species (receptors and ligand-receptor complexes) values were computed at the center of the cell (), while surface species were determined at . nM, min. Other conditions as in Fig.3.