Graphs of GC content plotted over the entire plastid genomes of Drimys and Piper. X axis represents the proportion of GC content between 0 and 1 and the Y axis gives the coordinates in kb for the genomes. Coding and non-coding regions are indicated in blue and red, respectively. The green dashed line indicates that average GC content for the entire genome.
Cai et al. BMC Evolutionary Biology 2006 6:77 doi:10.1186/1471-2148-6-77