Construct: Fragment of Mos1 up to nucleotide 787, including the Dmau\mariner 5' terminal repeat.
Dmau\mariner\T coding region interrupted at position 789 by introduction of w+mW.hs.
Insertion of foreign DNA, including w+mW.hs, in the SacI site at position 789 of the Mos1 transposable element.