Table 1.

A summary of the effect of different GDNF signalling mechanisms on explant branching

Figures	GDNF-stimulated cell division	Chemotaxis	Anisotropic cell division (ACD)	Branching
4, 5a	−	−	−	−
4, 5b	+	−	−	+
4, 5c	−	+	−	−
4, 5d	+	+	−	+
4, 5e	−	−	+	−
4, 5f	+	−	+	++
4, 5g	−	+	+	−
4, 5h	+	+	+	++

Each row of the table corresponds to specific panels of Figs. 4 and 5, with corresponding parameter sets indicated in Table S1. In the middle three columns “−” indicates that the mechanism is inactive, “+” indicates that it is active. In the right-hand column “−” indicates no significant branching, “+” indicates modest branching and “++” indicates that branching that is consistent with experimental data