Distribution of RGD peptide-containing alginate chains in the gel at different dilution factors (A, 10; B, 4 dilution factor), calculated using a two-dimensional Monte Carlo modeling method (dark circle, RGD-containing polymer chain; gray circle, non-RGD-containing polymer chain). (C) The majority of peptide-containing polymer chains typically were present in a group size of one (no immediately adjacent peptide-containing chains), but the fraction of these chains present in groups of immediately adjacent peptide-containing chains increased with decreases in the dilution factor (○, 10; ●, 4 dilution factor).