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Fig. 5. UNC-115 acts downstream of Rac signaling in CAN and PDE axon pathfinding.
The genetic relationships between the three racs, unc-73 and
unc-115 are shown. Arrows indicate that the genes act in the same
pathway. Three rac genes ced-10, mig-2 and rac-2/3,
define three parallel pathways with overlapping function. unc-73 acts
in all three pathways, and unc-115 acts downstream of rac-2
and possibly ced-10. unc-73 might have rac-independent roles
in axon pathfinding possibly mediated by the rho-1 gene that encodes
the single C. elegans Rho GTPase. GEF, GTP exchange factor; abp,
actin-binding protein.