Table 3 Correlation between sequence identity and expression context conservation for 1-1 orthologs between all species pairs. P is the probability that the data set is a sample drawn from a distribution with correlation coefficient zero.

C. elegans

D. melanogaster

0.077

8.41·10^-4

C. elegans

H. sapiens

0.060

4.49·10^-3

C. elegans

S. cerevisiae

0.121

5.14·10^-6

D. melanogaster

H. sapiens

0.092

6.27·10^-5

D. melanogaster

S. cerevisiae

0.050

9.01·10^-2

H. sapiens

S. cerevisiae

0.061

1.46·10^-2