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Table 1 CpG islands and other genomic features in ten mammalian genomes

From: CpG island density and its correlations with genomic features in mammalian genomes

  Genome CpG islands
Species Size (Gb)* Number of chromosome pairs Number of arms GC content (%) ObsCpG/ExpCpG Number of CGIs CGI density (/Mb) Avgerage length (bp) GC content (%) ObsCpG/ExpCpG
Human 2.85 23 82 40.9 0.236 37,531 13.2 1,089 62.0 0.743
Chimpanzee 2.75 24 84 40.7 0.233 35,845 13.0 1,011 60.3 0.761
Macaque 2.65 21 84 40.7 0.245 39,498 14.9 957 60.8 0.749
Mouse 2.48 20 40 41.7 0.192 20,458 8.2 1,043 60.6 0.756
Rat 2.48 21 64 41.9 0.220 19,568 7.9 1,004 59.7 0.758
Dog 2.31 39 80 41.0 0.244 58,327 25.3 1,102 62.2 0.753
Cow 2.29 30 62 41.9 0.236 36,729 16.0 1,023 61.2 0.740
Horse 2.03 32 92 41.0 0.285 33,135 16.3 937 59.2 0.749
Opossum 3.34 9 24 37.6 0.129 24,938 7.5 919 60.8 0.698
Platypus 0.41 26 NA 43.3 0.296 14,686 35.9 929 56.8 0.785
  1. *The nucleotides marked as 'N' were not included in the analysis. Number of arms in a female. Incomplete genome sequences (only 19 partially assembled chromosomes). NA, not available.