Figure 1. The gene map of Huperzia squarrosa mitochondrial genome.

Genes (exons indicated as closed boxes) shown on the outside of the circle are transcribed counter-clockwise, whereas those on the inside are transcribed clockwise. Genes with group II introns (open boxes) are labeled with asterisks. Pseudogenes are indicated with the prefix “ψ”. Repeats are marked with bold-face upper case letters (RA – RI) in regions where they are located. The two red arcs indicate the duplicated rRNA gene clusters.