Figure 7. Compactness (C = A _cluster/A _hull) of 128-cell clusters on 200×200-pixel lattices (∼400 µm×400 µm) after 5,000 MCS (∼40 h) for standard chemotaxis, as a function of the adhesion between endothelial cells, J(c,c).

For J(c,c)<40 (i.e., J(c,c)<2 J(c,M) the cells adhere without chemotaxis. Insets: Representative configurations after 5000 MCS (∼40 h).