Fig. 2
Principal component analysis of β-values at differentially methylated CpG loci from 49 cardiac tissue samples. a Principal component analysis based on β-values of differentially methylated 271 CpG loci (q ≤ 1 × 10−6 (σ/σmax > 0.4), ANOVA) of 49 different cardiac tissue samples (IAS, LA, RA, LV, RV) that were subjected to 450K array analysis. Subgroups of atrial and ventricular samples are marked as dashed and solid edging, respectively b. IAS: red spheres, LA: pink spheres, RA: green spheres, LV: blue spheres, RV: yellow spheres. Credits: Centers for Disease Control and Prevention, National Center on Birth Defects and Developmental Disabilities [29]