Fig. 7. ahr-1, ceh-10 and lim-4 function independently of each other in RME neurons. (A) Expression of a functional AHR-1::GFP (iaIs2) is unaltered in ceh-10 and lim-4 mutants. Arrows indicate RMEL in the three panels. Not all AHR-1 expressing neurons are in focus. (B) Double mutants of ahr-1, ceh-10 or lim-4 show additive phenotypes. Genotypes are shown above the panels. The top panels show RMEL/R neurons and the bottom panels show RMED/V neurons. Asterisks indicate the ectopic nerve process of RMEL/R; arrows indicate RMEV; solid arrowhead indicates RMED in ahr-1, lim-4 double mutants; empty triangles show the presumed RMED position; and the fluorescence spots are from the distal ends of RMEV. More than 100 animals were observed for each genotype.