Precise integration of Helitrons into the host AT target
sites. Six insertion cases of Helitrons (red) into
different transposons (green) are shown separately. Two copies of
ATREP1, two copies of Helitrony3_CE, and single copies
of Helitrony2_CE and ATREP9 are inserted into copies
of the ATTIRX1D, ATHATN1, PAL5A_CE, LTR2_CE, PALTTAA1_CE, and
ATREP10 transposons, respectively. The consensus sequences of the
elements harboring Helitrons are marked by the bold
black letters and are described in the A. thaliana
and C. elegans sections of Repbase Update at
www.girinst.org/Repbase_Update.html. Consensus sequences of the
corresponding Helitrons are marked in blue. Asterisks,
semicolons, and dots indicate identical nucleotide positions,
transitions, and transversions, respectively. Only termini of
Helitrons are shown. Black, green, and blue numbers show
positions in the consensus sequences of the harboring transposons,
GenBank, and Helitron consensus sequences,
respectively.