The genome can be considered as comprised of Regions 1-3 (outer ring) that are dominated by structural genes, replication-related genes, and unique genes, respectively. Subsequent rings represent: positive strand ORFs, negative strand ORFs, tRNAs (maroon), and positive mass spectrometry identification (mauve). The inner rings show GC content around a 50% mid-line (black), and GC skew (G+ = cyan, C+ = blue). Putative ORF function is described by color as listed below the circular map.