Fig. 2.

Comparisons of gene age assignment between different studies. (A) Distribution of gene ages for different CDS sources. (B) Gene age comparisons between different genome-wide studies. In the sgdCDS group, we identified 47 age 0 genes and 50 age 1 genes, many of which were either not identified or assigned different ages in other studies. (C) The factors contributing to the exclusion of 755 de novo sgdCDSs identified in previous genome-wide studies. Also, see supplementary figures S1–S3, Supplementary Material online, for detailed comparisons.