Construct: Amino acid replacement: T35E. Amino acid replacement: S84E. Amino acid replacement: T358E. Amino acid replacement: S364E.
Embryos exhibit a slight block in head development and a partial reduction in the cephalopharyngeal skeleton. This is the class I phenotype. Development of the thorax and abdomen are unaffected.
Results suggest a constitutively phosphorylated form of Antp has reduced activity in vivo and cannot generate a T2 identity.