Transgenic construct used to study the properties of the bxd Polycomb response element (bxdPRE) from the Ubx gene. Contains a w+mC marker, a Ecol\lacZUbx.2212S2 reporter and 6 copies of the 191bp BP (BglI/PstI) fragment of the bxdPRE.
6 copies of the 191bp BP (BglI/PstI) fragment of the UbxPRE are inserted between the Ubx S2 enhancer and Ubx promoter sequences.