A 2.8kb sna promoter fragment drives expression of the wor coding region.
worsna.PA is a non-suppressor of ventral furrow phenotype of sna18
worsna.PA partially rescues Df(2L)osp29
The severe central nervous system defects of Df(2L)osp29 embryos are slightly rescued if they are carrying both esgsna.PA and worsna.PA.