Nucleic Acids Res. 2011; 39: 4099–4108. doi: 10.1093/nar/gkr017.
The authors would like to apologize for an error in Figure 1D of their article. The methylation entropy for the methylation pattern shown in Figure 1D should read ‘ME = 0.25’ not ‘ME = 0.1875’. The corrected figure appears below. The entropy for code bit (e) in Figure 1A is 3.321928095. This error does not affect the results and conclusion of the article.