Representative electrophoretogram of rat testis showing bands of acetylated core histones and enzymatic molecules implicated in displacement of nuclear histones during sperm chromatin remodelling. (A) H2AK5. (B) H2BK5. (C) H4K5. (D) H4K12. (E) H4Kpenta. (F) BRD6. (G) HDAC1. (H) Cdyl. (I) TOPIIβ. (J) PEM. Lane M: Rainbow markers. Lane F: FD-treated samples. Lane C: Control samples. Lane P: CPA-treated samples. Lane N: Negative controls.