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The number of genes that show altered DNA methylation states following prenatal TiO2-NP exposure. Number of genes presenting altered DNA methylation states between Sham and TiO2-H groups in the brains of 1-day-old offspring mice [(A): male, (B): female]. Black and gray bars indicate the number of genes with increased and decreased DNA methylation levels, respectively, in the TiO2-H groups when compared with the Sham group. The x-axis shows chromosome numbers.
