"in a wildtype background, induction of a heat-shock promoter driven
dbl-1 transgene (HS::
dbl-1) during the Rn stage of raydevelopment causes ectopic expression of the DA marker CAT2::GFP in R3A, R4A, R6A and R8A (Table 3). By contrast, in a
sma-9 mutant background, HS::
dbl-1 gene activation does not induce ectopic expression of CAT-2::GFP and animals display a
sma-9 mutant phenotype (Table 3)."