Fig. 6

Termini of Helitrons in Chaetomium globosum exemplify conservation of 3’ terminal sequences. We determined the termini for two groups of Chaetomium globosum Helitrons that group together with FoHeli1 and FoHeli2 in the tree in Fig. 5, Additional file 1: Figure S12 and Figure S13. Terminal inverted repeats (TIRs) are in bold. In contrast to the ATIRs in FoHeli1 and FoHeli2, the ATIRs of these Helitrons are not hairpins. The sequence of the 3’ termini closely resembles those of FoHeli1 and FoHeli2, as they also end in ‘ATTTT’. Moreover, the bottom two subgroups possess imperfect palindromes overlapping their ATIRS