Geometric structure of the modelled tissue. The intensity of signal reaching the considered SC (black circle) from SCs in the first, most proximal, layer (blue), second layer (green) or third layer (red) is determined by the respective signal intensity coefficients K1, K2 or K3. Note that the drawn cell sizes are insignificant and that nodes may be occupied by differentiated cells.
Agur et al. Biology Direct 2010 5:20 doi:10.1186/1745-6150-5-20