Figure 3.
Sequence alignments of zinc-finger motif (ZF) and restriction-like endonuclease (RLE). Five Dualen elements and representatives of five clades of early branched non-LTR retrotransposons were aligned. Catalytic residues of restriction enzymes (FokI and EcoRV) are also shown. Residues conserved among all sequences are red, and residues conserved among Dualen elements are yellow. Residues conserved among other retrotransposons, but not among Dualen elements are green. Catalytic residues are indicated by asterisks.
