(A) Global acetylation levels of H3K9 and global methylation levels of H3K4 in embryos. (B) Relative fluorescence intensities of H3K9ac and H3K9m3. (A) Staining of H3K9ac and H3K4me3 in dox-induced/treated SCNT (induced NT), in vitro fertilized (IVF), and no dox-induced/treated SCNT (control NT) embryos at the two-cell, eight-cell, and blastocyst stages. Each sample was counterstained with DAPI to visualize DNA. Original magnification, 200×. (B) Average optical intensity of H3K9ac and H3K4me3 was measured using Image-Pro Plus 6.0 software. Values are presented as mean±SEM. Labeling intensity was expressed relative to that of the IVF embryos (set as 100%). Values with different superscript letters (a, b) within groups indicate significant difference (p<0.05).