Table 1.

Dimensional parameters used in the model of cell migration based on Dictyostelium discoideum cells and the ligand cyclic AMP.

quantity	symbol	typical value
diffusion coefficient of ligand	D	4.44 × 102 µm2 s−1	[27]
diffusion coefficient of receptor–ligand complex	Ds	1 × 10−1 µm2 s−1	[28]
enzyme Michaelis–Menten constant	Km	0.75 µM	[3]
ligand disassociation rate		1 s−1	[29]
ligand association rate	k1	1/30 nM−1 s−1	[29]
number of receptors per cell	Nrec	75 000	[30]
radius of cell	r0	5 µm	[21]