Select antibody: H3K27ac Abcam ab4729 GR45851-1 H3K27ac ActiveMotif 39133 NA H3K27ac ActiveMotif 39685 21516012 H3K27ac ActiveMotif 39685 NA H3K27ac CST 8173 1 H3K27ac Diagenode C15410196 A1723-0041D