Re-mobilization of the transposon from unspecified Tn(sb-SBlac)15Fsp transgenic mice with Sleeping Beauty transposase from an unidentified line of TgTn(sb-SBlac)15Fsp transgenic mice results in the integration of the transposon into chromosome 15. The transposon consists of a Sleeping Beauty transposon inverted repeat, loxP site, human beta-globin HBB minimal promoter, the lacZ beta-galactosidase reporter gene, SV40 poly(A) signal sequence, and a Sleeping Beauty transposon direct repeat. (J:212391)