Figure 9.

Distribution of Stop Codons and GC Content in Plastid Chromosomes.

Completely sequenced plastid chromosomes of the algae Toxoplasma gondii, Cyanophora paradoxa, Astasia longa, Euglena gracilis, Mesostigma viride, Nephroselmis olivacea, Chlamydomonas reinhardtii, Chlorella vulgaris, Cyanidium caldarium, Porphyra purpurea, Odontella sinensis, and Guillardia theta, the moss Marchantia polymorpha, the fern Psilotum nudum, Pinus thunbergii, the dicot plants Epifagus virginiana, Arabidopsis thaliana, Spinacia oleracea, Oenothera elata, Nicotiana tabacum, and Lotus japonicus, and the Liliopsida species Zea mays, Oryza sativa, and Triticum aestivum (http://www.ncbi.nlm.nih.gov/PMGifs/Genomes/plastids_tax.html) were included in our analysis. ORFs were excluded from the analysis (see Discussion).