Relationship between the numbers of synonymous substitutions and unique genes. Black circles represent the numbers of unique genes that are missing from the Oj genome, and black triangles represent the numbers of unique genes that are missing from the Oi genome. A white circle represents the number of Oi-specific genes missing from the Oj genome, and a white triangle represents the number of Oj-specific genes missing from the Oi genome. The regression line indicates a constant rate of gene deletion over time.
Sakai and Itoh BMC Genomics 2010 11:121 doi:10.1186/1471-2164-11-121