Transgenic construct used to analyze the insulating activities of human matrix attachment regions (MARs) in a position effect assay. Derived from P{mwS'}; a 800bp EcoRI-NcoI fragment containing part of intron 5, exon 6 and part of intron 6 of Hsap\APOB has been inserted upstream of the w transcription unit.
Construct: 0.5kb of scs' sequences.