Construct: Amino acid replacement: R?A. Amino acid replacement: K?A. Amino acid replacement: N?A. The IRRRGKNKV sequence in the DNA binding domain of cncB has been changed to IRAAGAAKV.
About half of embryos expressing heatshock induced cncB.Ala.hs survive, and embryos that fail to hatch have wild-type head morphology.