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Graphical illustration of the currently most consistently identified genome-wide histone modifications in fear-/anxiety- and stress-related animal models. Abbreviations: ac: acetylation; H: histone (H3 or H4); K: lysine; Kx: amino acid position of lysine counting from N-terminus; me1: monomethylation, me2: dimethylation, me3: trimethylation.
