Transgenic construct used to study the requirements for amplification of the third chromosome chorion gene cluster. Contains (5' to 3'): a gypsy insulator - a 3.8kb SalI genomic fragment from the chorion gene cluster (this includes the ACE3 amplification control element, the Cp18 transcription unit, the Ori-β origin of replication and the Cp15 transcription unit) - the y+mDint2 marker - a gypsy insulator.
report comment: Similar to P{S3.8}; addition of buffering gypsy\su(Hw)BR elements at ends of construct.