a:
oig-1 locus, oig-1 fosmid-based reporters (SL2::NLS::GFP fusion to assess gene regulation; GFP fusion after signal sequence to assess protein localization), deletion allele and oig-1fosmid::sl2::nls::gfp expression pattern (similar results with 2 independent lines).
b:
oig-1 expression is regulated by the transcription factors unc-30 (0/20 animal express the reporter at any stage), lin-14 (3/20 L1 stage animals express the reporter but at reduced levels; scored in progeny from lin-14 null mothers carrying a lin-14 rescue array 23, n=20), and unc-55 (0/20 animal express the reporter in VD MNs; 20/20 animals express reporter in DD neurons), but not by alr-1 (20/20 animal express the reporter), in which VD identity but not synaptic wiring is affected 24. In lin-4 animals, oig-1 expression in DDs persists into the adult stage (20/20 adult animal express the reporter).