Developmental programming of DNA methylation and gene expression patterns is associated with extreme cardiovascular tolerance to anoxia in the common snapping turtle

Table 8 Summary of the observed and the expected number of CGIs in different genomic features

Genome feature	Length of feature in genome	Proportion of genome	Observed CpG Islands	Expected CpG Islands
Intergenic region	2,167,077,285	0.96	109,766	193,725
Promoter	22,812,000	0.01	4689	2039
Gene body	67,834,108	0.03	87,373	6064
Total	2,257,723,393	1.0	201,828	201,828

Expected numbers of CGIs in intergenic regions, promoters, and gene bodies were calculated based on the proportion of the snapping turtle genome found in each of these genomic features