The spatial distribution of H3K4me3 across the GAPDH gene. Using antibodies specific for H3K4me1, H3K4me2, H3K4me3, H3K79me2, or H3K36me3, the enrichment levels (% input) of these different histone modifications were determined in MEFs at the GAPDH transcriptional start site (TSS) and gene body. a The distribution profiles of H3K4me1, H3K4me2, and H3K4me3 at GAPDH. b The distribution profiles of H3K79me2 and H3K36me3 at GAPDH. In both figures, the genomic region analyzed by qPCR is shown on the x-axis and is designated as kilobase (kb) distance from the TSS. Error bars represent the standard deviation (±SD) of three independent ChIP assays.