Figure 4.

Amino acid sequence alignments of dsRHbds from prokaryotes. Arrows and rectangles indicate beta-strands and alpha-helices, respectively. These secondary structures were generated on the basis of the N-terminus domain of S. cerevisiae RNase H1 [35]. Arrows and rectangles indicate beta-strands and alpha-helices, respectively. Dark and light shadings indicate highly conserved and similar amino acid residues, respectively. Asterisk represents an identical amino acid residue. The symbol ^† indicates that the gene containing the resolvase domain encodes the amino acid sequence of dsRHbd. For detailed information, see Table 3.