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Table 1 Statistics and distribution of CGIs and CGCs in the human (NCBI build 36) and mouse genomes (NCBI build 37)

From: CpG islands or CpG clusters: how to identify functional GC-rich regions in a genome?

  Human Mouse
  CGIs (%a) CGCs (%a) CGIs (%a) CGCs (%a)
Genome length (bp) 2.86 × 109 2.86 × 109 2.61 × 109 2.61 × 109
# CGIs/CGCs 37,729 198,702 21,326 121,885
Coverage (%)b 1.44 1.90 0.85 1.48
Length (bp) 1,090 ± 717 273 ± 246 1,045 ± 519 318 ± 297
GC content (%) 60.61 ± 5.06 63.78 ± 7.50 60.0 ± 4.0 61.4 ± 10.0
ObsCpG/ExpCpG 0.717 ± 0.082 0.855 ± 0.265 0.730 ± 0.093 0.949 ± 0.426
Promoter regions 13,196 (35.0) 29,156 (14.7) 10,942 (51.3) 19,791 (16.2)
TSSs 15,106 (40.0) 21,741 (10.9) 12,175 (57.1) 16,675 (13.7)
Genic regions 24,841 (65.8) 104,924 (52.8) 15,541 (72.9) 63,555 (52.1)
Intergenic regions 12,888 (34.2) 93,778 (47.2) 5,785 (27.1) 58,330 (47.9)
8-bp CGCs     
   Sub-total   232   775
   Promoter regions   12 (5.2c)   13 (1.7c)
   Intergenic regions   144 (62.1c)   439 (56.6c)
  1. aProportion (%) of CGIs or CGCs in the genomic region over the total number of CGIs or CGCs in the genome.
  2. bProportion (%) of the genome sequence covered by CGIs or CGCs.
  3. cProportion (%) of the CGCs in the promoter regions or intergenic regions among the total 8-bp CGCs.