(A) Isolated region of the Hemiselmis andersenii mitochondrial genome located near the 3' end of the large intergenic space. This area includes a palindromic sequence that is predicted to form a Type II stem-loop followed by high and low GC regions. A similar region is not found in the R. salina mtDNA. (B) Three predicted stem-loop structures found within the large intergenic space. Note that Type I-a and I-b differ only by 3 nucleotides.