Fig. 2.

(A) Sea squirt (Ciona intestinalis) genes with low and high levels of DNA methylation in promoters and gene bodies. Figures drawn using values calculated from sliding windows that are 100 bases wide with a 10-base step size. Genes in this species can be classified into four groups, where promoter and gene bodies are lowly and highly methylated, respectively. The numbers of genes in each group are described in the main text. (B) Variation of gene expression levels of these four methylation categories.