Genomic fragment containing a mutant form of exu that carries the amino acid replacements D39A and D41A (putative catalytic site mutant). The protein is tagged at the N-terminal end with Venus and Tag:StrepII.
The exuD39A.D41A.T:Zzzz\StrepII,T:Avic\GFP-YFP.Venus/exuVL transheterozygote embryos do not show any defects in the (anterior) localization of bcd mRNA.