A heat shock promoter drives expression of the cnc A isoform. The construct contains 100bp of 5' UTR and 800bp of 3' UTR from exon A3.
Ectopic expression of cncA.hs during embryogenesis has no effect on embryonic morphology. Most of the embryos hatch and many eclose as viable adults.
Dfdhs.PK, cncA.hs has mouth hook | ectopic phenotype