Table 13

Characteristics of CpG islands identified in chromosome 22 (34-Mbp sequence length) and the whole genome (2.9-Gbp sequence length) by means of two different methods. Method 1 uses a CG likelihood ratio of ≥0.6. Method 2 uses a CG likelihood ratio of ≥0.8.

Chromosome 22Whole genome (CS assembly)
Method 1Method 2Method 1Method 2
Number of CpG islands detected5,211522195,70626,876
Average length of island (bp)390535395497
Percent of sequence predicted as CpG5.90.82.60.4
Percent of first exons that overlap a CpG island44254222
Percent of first exons with first position of exon contained inside a CpG island37224021
Average distance between first exon and closest CpG island (bp)1,01310,4862,18217,021
Expected distance between first exon and closest CpG island (bp)3,26232,5677,16455,811