Comparison of the cp genomes of C. variabilis , Chlorella sp. ArM0029B, and C. vulgaris . Thick bars represent protein-coding genes (blue), rRNA genes (green), and tRNA genes (red). Genes in the inverted region were highlighted in orange (protein-coding genes) and purple (tRNA genes) boxes in ArM0029B. LCBs and conserved genes are connected by light and dark gray rhomboids, respectively.