Table 1

Mean divergence and GC content values for each class of DNA

Divergence

GC Content

All

Short*

Long*

All

Short*

Long*

Introns

All

0.093 (0.004)

0.110 (0.005)

0.070 (0.003)

0.357 (0.006)

0.345 (0.009)

0.371 (0.007)

First

0.101 (0.005)

0.114^† (0.006)

0.072^† (0.006)

0.361 (0.010)

0.352^† (0.013)

0.383^† (0.011)

Non-first

0.085 (0.005)

0.105^† (0.009)

0.069^† (0.004)

0.352 (0.007)

0.337^† (0.012)

0.365^† (0.008)

Synonymous sites

0.127 (0.019)

0.654 (0.014)

Values are mean (standard error). *Introns were divided into two classes based on the median intron length (86 bp) [14]: short, ≤86 bp; long, >86 bp. ^†Divergence and GC content values did not differ between first and non-first introns when compared within long and short size classes.

Haddrill et al. Genome Biology 2005 6:R67   doi:10.1186/gb-2005-6-8-r67