Nucleotide sequence, transcript and putative transposase of the CsuPLE1.1 . The nucleotide sequence in the light gray shadow is the CsuPLE1.1 transcript. The inverted terminal repeats (ITRs) are underlined and italicized. The sub-terminal inverted repeats are double-underlined and italicized. The 4 bp (TTAA) target site duplications (TSDs) are boxed and in bold. Putative CAAT, TATA and AATAAA polyadenylation signal site sequences are underlined and in bold. The primers used in flanking PCR are indicated by left and right arrows below the corresponding sequences. The “DDD-motif” amino acid residues in the putative transposase are indicated by open circles. The bipartite nuclear localization signal (NLS) is boxed and in bold.