Table 1

Evolutionary distance (substitution level) comparisons between duplicates and singletons

Comparisona
% differenceb
Duplicate – nc
Singleton – nc
Pd

Human – Mouse (gamma)
47.11
10,753
2,517
4.2 × 10-50
Human – Mouse (dN/dS)
37.79
10,753
2,517
5.1 × 10-61
Drosophila Anopheles (gamma)
26.37
4,902
2,233
4.8 × 10-50
S. cerevisiae C. albicans (gamma)
25.68
1,584
1,845
8.8 × 10-46
E. coli Y. pestis (gamma)
5.11
1,110
1,235
0.17
B. subtilis B. halodurans (gamma)
4.41
1,021
1,081
0.10
P. horikoshii P. furiosis (gamma)
13.38
574
872
0.02

a Species comparison used to calculate evolutionary distances. Gamma distances are the number of amino acid substitutions per site. dN/dS is the ratio of non-synonymous (dN) to synonymous (dS) nucleotide CDS substitutions. b Percent difference is calculated by taking the absolute value of difference between duplicate and singleton distances and dividing by the average distance for all genes c Numbers of orthologous gene pairs compared to calculate average distances for duplicate and singleton genes d P-value for the t-test comparing duplicate and singleton distance averages

Jordan et al. BMC Evolutionary Biology 2004 4:22   doi:10.1186/1471-2148-4-22