The Minos-specific double-transposon trap with 3 STOP codons inserted into the first intron. RT-PCR confirmed the expression of a truncated fusion transcript. This allele was generated by crossing Hist1h1ttm1.1(mm)Ddra or Tg(Hist1h1t-mm)ADdra mice with TgTn(mm-DTT-3XSstop)LDdra mice.