UASt regulatory sequences drive expression of the serine protease domain of teq (amino acids 1181-1426) fused at the N-terminal end with the Drs signal peptide (Tag:SS(Drs)). The teq sequence contains the amino acid replacement C1295S (the Cys residue is required for the protease/protease prodomain disulfide bond). Encodes an autoactivated form of teq.