Fig. 2

5mC methylation partners in different environments Pb exposure groups. A Correlation heatmap showing 5 mC methylation correlation between the RH group (blood Pb, 5–10 µg/dL) and the RL group (blood Pb, 0–2.5 µg/dL). B Correlation heatmap showing 5 mC methylation correlation between the RM group (blood Pb, 2.5–5 µg/dL) and RL group (blood Pb, 0–2.5 µg/dL). C Principal component analysis (PCA) of methylation measurements in the RH and RL groups. D PCA of methylation measurements in the RM and RL groups. EComparison of the average coverage profile at  ±  200 bp near the 5 mC methylation peaks summit between the RH and RL groups. F Comparison of the average coverage profile at  ±  200 bp near the 5 mC methylation peaks summit between the RM and RL groups