Epigenetic modifications in centromeric and pericentric chromatin. Centromeres consist of alternating blocks of nucleosomes containing H3 or cenH3. At pericentric sites, only H3-containing nucleosomes are present. Epigenetic markers in centomere and pericentromere regions characteristic for both plants and animals are marked with black color, only for plants with violet color, only for animals with rose color. (+) epigenetic marker always present; (-/+) epigenetic modification present or absent.