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Table 1 Mean divergence and GC content values for each class of DNA

From: Patterns of intron sequence evolution in Drosophila are dependent upon length and GC content

  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)   
  1. 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.