FIG. 9.

Alignment of the available crenarchaeal SRSR sequences. The closely similar Sulfolobus and Acidianus sequences were aligned manually in a group, and the more divergent crenarchaeal sequences were aligned separately. Conserved nucleotides are blackened. The asterisks denote the sequences used in the present study. The positions of the strongly enhanced DNase I cuts on the two DNA are indicated by arrows above the alignment. The figure was prepared by using the BOX shade program (http://www.ch.embnet.org/software/BOX_form.html).