(A) Postembryonic cell lineages leading to the ray neurons (Sulston and Horvitz 1977). RnA, A-type neuron; RnB, B-type neuron; Rnst, structural cell; X , programmed cell death. Rn.p is a hypodermal cell. Dopaminergic A-type neurons (green; Sulston and Horvitz 1977), EGL-5-expressing cells (yellow; Ferreira et al. 1999), MAB-23::GFP-expressing cells (black). (B) Adult male tail (lateral view; anterior,left; dorsal, up) showing the location of dopaminergic ray neurons (green). PAG, preanal ganglion. (C)
mab-23 expression in wild-type adult male rays. Fluorescent micrograph of a transgenic adult male (dorsal view) expressing EM#308 reporter. MAB-23::GFP localizes predominantly to cell nuclei in the A-type neurons of rays 1-4 and 6 and the non sex-specific PHCL/R neurons. Bar, 10 μm.