UASt regulatory sequences drive expression of a mutated form of ci. The three PKA sites have been mutated to Ala. In addition, amino acids 212-260 have been deleted, removing the SIN ('Su(fu)-interacting site in the N-terminal region') site and amino acids 1371-1397 at the C-terminal end of the protein have been deleted, removing the SIC ('Su(fu)-interacting site in the C-terminal region') site. The protein is tagged with six copies of Tag:MYC.