Transgenic construct used in an enhancer-blocking assay to analyze the Fab-7 element of the bithorax complex and its ability to form a chromatin domain boundary. Derived from P{wRW+we}; a truncated Fab-7 element (HindIII-ApaI fragment) has been inserted between the w enhancer and w transcription unit.
Construct: HindIII-ApaI fragment containing major nuclease hypersensitive sites HS1 and HS2.
Construct: 0.5kb of scs' sequences.