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Table 2 The nucleotide composition of human genome introns and FFD codons

From: Strand bias in complementary single-nucleotide polymorphisms of transcribed human sequences: evidence for functional effects of synonymous polymorphisms

Region A T G C Total
Intron* 126,530,426 (28.0%) 139,073,101 (30.7%) 94,268,606 (20.8%) 92,418,338 (20.4%) 452,290,471 (100.0%)
FFD codons 575,500 (19.5%) 615,324 (20.8%) 822,103 (27.8%) 939,137 (31.8%) 2,952,064 (100.0%)
  1. * The first introns as well as the first and last 200 bp of each intron were excluded;