Figure 3.

Alternative versions of the gene cluster containing the gene encoding L30e in the Archaea. Labels are as in Figures 1 and 2. Group A shows the archaeal arrangements and Group B is the arrangement typically found in the Firmicutes. The gene which is homologous to the gene for L30e in the Firmicutes is typically incorrectly annotated as a second copy of the gene encoding L7ae as discussed in the text.