Histone acetylation of genes up-regulated in axe1-5 plants. The relative levels of acetyl H3K9K14 of genes involved in flowering (A), gene silencing (B), stress (C), and transposons (D) in Col and axe1-5 were analyzed by ChIP. The immunoprecipitated DNA was quantified by real-time PCR and subsequently normalized to an internal control (ACTIN2). The fold enrichment of axe1-5 over Col is shown, and the values shown are means ± sd. * P < 0.05, ** P < 0.01.