Faster evolving Drosophila paralogs lose expression rate and ubiquity and accumulate more non-synonymous SNPs

Biology Direct

Table 1 Summary of data used (See Additional file 3 : Table S1 and Additional file 4 : Table S2 for whole dataset)

Dataset		Number of gene families	Number of duplications	Number of pairs of paralogs
Whole phylogeny		1470	1726	3398
D. melanogaster	Total	175	175	314
	Has expression data	162	162	276
	Has SNP data
	(>2 SNPs per gene)	141	141	239

The number of paralog pairs is higher than the number of duplications because of nested duplications (only the outermost, i.e., oldest duplication was included in the analysis, but substitution rates observed for all nested paralogs were averaged to obtain the mean estimate).