Histones are basic nuclear proteins that are responsible for the nucleosome structure of the chromosomal fiber in eukaryotes. Nucleosomes consist of approximately 146 bp of DNA wrapped around a histone octamer composed of pairs of each of the four core histones (H2A, H2B, H3, and H4). The chromatin fibre is further compacted through the interaction of a linker histone, H1, with the DNA between the nucleosomes to form higher order chromatin structures.
ab5819 is specific for Histone H3 phosphorylated at residue S10 and tri methylated at residue K9. The activity of the antibody is blocked by the addition of the immunizing peptide, ab15644 (lanes 3 and 4).
SKN cells stained with ab5819 (green) at a dilution of 1/2000. The cells were fixed in paraformaldehyde for 10 minutes prior to incubation with ab5819. The DNA is stained with DAPI (blue). 100x magnification.
ab5819 at a 1/500 dilution staining mitotic human HeLa cells by immunocytochemistry. The antibody was incubated with formaldehyde fixed cells for 1 1/2 hours and bound antibody was then detected using a Texas red conjugated goat anti-rabbit IgG.
This image is courtesy of an Anonymous Abreview submitted on 6 April 2006.
IHC image of Histone H3 (tri methyl K9, phospho S10) staining in human breast carcinoma FFPE section, performed on a BondTM system using the standard protocol F. The section was pre-treated using heat mediated antigen retrieval with sodium citrate buffer (pH6, epitope retrieval solution 1) for 20 mins. The section was then incubated with ab5819, 5µg/ml, for 8 mins at room temperature and detected using an HRP conjugated compact polymer system. DAB was used as the chromogen. The section was then counterstained with haematoxylin and mounted with DPX.
Sabbattini P et al. An H3K9/S10 methyl-phospho switch modulates Polycomb and Pol II binding at repressed genes during differentiation. Mol Biol Cell25:904-15 (2014).
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