2 of the cysteines in the C2H2 structure of the 1st Zn-finger (out of four) are mutated to Alanines in a 21kb 'pCaSpeR4-sens' genomic rescue construct.
Amino acid replacement: C?A.
sens1CCg is able to rescue many of the external sensory organs in adult sensE2 clones, which lose almost all mechanosensory bristles.
Expression of sens1CCg is able to partially restore the number of post-orbital bristles in sensE2 clones to approximately two-thirds of the wild-type.
Expression of sens1CCg does not rescue the lethality of sensE2 homozygous embryos. However, a significant rescue of PNS development is observed. The rescue is however, not complete, as some of the neurons are lost. In addition, the neurons exhibit differentiation, axon guidance, and fasciculation defects.