Figure H80.

The structure of a complete P element of Drosophila (2,907) flanked in the genomic DNA target site by 8 bp direct repeats. The numbers in parenthesis indicate the nucleotide positions (beginning with the 5′ end). The horizontal arrows indicate the direction of the repeats; the vertical arrows point toward the positions in the linear sequence of the P element. (After Engels WR 1989. Mobile DNA, Berg DE & Howe MM, eds., pp. 437–484. American Society of Microbiology, Washington, DC.)