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Table 1 Comparison of methylated and unmethylated promoter CGIs.

From: Correlating CpG islands, motifs, and sequence variants in human chromosome 21

  Unmethylated CpG Islands Methylated CpG Islands P-Value
Number of Islands 150 13  
Length 1188.27±161.48 1145.92±359.79 < 1.48 x 10-11
GC Content (%) 60.76±10.34 66.44±19.34 < 1.81 x 10-2
Obs CpG /Exp CpG 1.49±0.25 1.63±0.47 < 1.81 x 10-2
  1. Methylated and unmethylated promoter CGIs were compared by sequence for average length, GC content (%), and ObsCpG/ExpCpG ratio. P-values were determine using the Kolmogorov-Smirnov two-sample test.