A concatemer of sleeping beauty transposable elements each consisting of the inverted repeat direct repeat sequence specific for sleeping beauty transposase flanking splice acceptor sites and poly A signals in both orientations. Between the splice acceptor sites is 5' long terminal repeat sequence from the murine stem cell virus followed by a splice donor site. This construct can create both loss-of-function and gain-of-function mutations. This record is an unspecified founder line.