Table 2

Comparison of compactness between genes expressed at different levelsa


Average intron length
Total intron length
Intron number
CDS length
UTR length
Expression level

Human genes
Top 30% quantile
2768 ± 608
28117 ± 7347
8 ± 1
1313 ± 90
775 ± 107
5369 ± 770
Versus






Bottom 30% quantile
10448 ± 4237
901046 ± 33210
9 ± 1
1764 ± 232
1478 ± 244
267 ± 14

P = 0.001
P = 0.019
P = 0.844
P = 0.273
0.019








Mouse genes
Top 30% quantile
2631 ± 290
16190 ± 1828
7 ± 1
1214 ± 65
779 ± 136
6219 ± 794
versus






bottom 30% quantile
8032 ± 2706
37391 ± 4615
8 ± 1
1450 ± 128
1496 ± 190
365 ± 16

P = 0.001
P = 0.001
P = 0.444
P = 0.589
P = 0.001


a The human genes and the mouse genes are those analyzed in Figure 1. We used the Mann-Whitney U test to determine the significance of differences. For each case, we present the average value ± standard error of mean.

Huang and Niu BMC Evolutionary Biology 2008 8:154   doi:10.1186/1471-2148-8-154