Anti-Histone H3 (di methyl K4) antibody [Y47] - ChIP Grade (ab32356)

Chromatin was prepared from HeLa cells according to the Abcam X-ChIP protocol. Cells were fixed with formaldehyde for 10 minutes. The ChIP was performed with 25µg of chromatin, 2µg of ab32356 (blue), and 20µl of Anti Rabbit IgG sepharose beads. 2μg of rabbit normal IgG was added to the beads control (yellow). The immunoprecipitated DNA was quantified by real time PCR (Sybr green approach). Primers and probes are located in the first kb of the transcribed region.

Immunocytochemistry/Immunofluorescence analysis of HepG2 cells labelling Histone H3 (di methyl K4) with purified ab32356 at a dilution of 1/1000. Cells were fixed with 4% paraformaldehyde and permeabilized with 0.1% Triton X-100. ab150077, an Alexa Fluor^® 488-conjugated goat anti-rabbit IgG (1/1000) was used as the secondary antibody. The cells were co-stained with ab7291, a mouse anti-tubulin (1/1000) using ab150120, an Alexa Fluor^® 594-conjugated goat anti-mouse IgG (1/1000) as the secondary antibody. Nuclei counterstained with DAPI (blue). 

Control 1: primary antibody (1/1000) and secondary antibody, ab150120, an Alexa Fluor^® 594-conjugated goat anti-mouse IgG (1/1000).

Control 2: ab7291 (1/1000) and secondary antibody, ab150077, an Alexa Fluor^® 488-conjugated goat anti-rabbit IgG (1/1000).

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) analysis of human cervical carcinoma tissue labelling Histone H3 (di methyl K4) with purified ab32356 at a dilution of 1/800. Antigen retrieval was performed using Tris/EDTA buffer, pH9. ab97051, a HRP-conjugated goat anti-rabbit IgG H&L was used as the secondary antibody (1/500). Counter stained with hematoxylin.

Flow Cytometry analysis of HeLa cells labelling Histone H3 (di methyl K4) with purified ab32356 at 1/150 (red). Cells were fixed with 80% methanol. An Alexa Fluor^® 488-conjugated goat anti-rabbit IgG (1/500) was used as the secondary antibody. Black - Isotype control, rabbit monoclonal IgG (ab172730). Blue - Unlabelled control, cells without incubation with primary and secondary antibodies.

    Chromatin was prepared from Hela cells according to the Abcam X-ChIP protocol. Cells were fixed with formaldehyde for 10min. The  ChIP was performed with 25µg of chromatin, 8µl of ab32356 (blue), and 20µl of Protein A/G sepharose beads. No antibody was added to the beads control (yellow). The immunoprecipitated DNA was quantified by real time PCR (Taqman approach). Primers and probes are located in the first kb of the transcribed region. Every new batch of this antibody is tested at Abcam in ChIP.

ICC/IF image of unpurified ab32356 stained HepG2 cells. The cells were 100% methanol fixed (5 min) and then incubated in 1%BSA / 10% normal goat serum / 0.3M glycine in 0.1% PBS-Tween for 1h to permeabilise the cells and block non-specific protein-protein interactions. The cells were then incubated with the antibody (ab32356 , 5µg/ml) overnight at +4°C. The secondary antibody (green) was a goat anti-rabbit DyLight® 488 (IgG - H&L, pre-adsorbed) (ab96899) used at a 1/250 dilution for 1h. Alexa Fluor® 594 WGA was used to label plasma membranes (red) at a 1/200 dilution for 1h. DAPI was used to stain the cell nuclei (blue) at a concentration of 1.43µM.

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) analysis of mouse colon tissue labelling Histone H3 (di methyl K4) with purified ab32356 at a dilution of 1/800. Antigen retrieval was performed using Tris/EDTA buffer, pH9. ab97051, a HRP-conjugated goat anti-rabbit IgG H&L was used as the secondary antibody (1/500). Counter stained with hematoxylin.

Immunohistochemistry (Formalin/PFA-fixed paraffin-embedded sections) analysis of rat spleen tissue labelling Histone H3 (di methyl K4) with purified ab32356 at a dilution of 1/800. Antigen retrieval was performed using Tris/EDTA buffer, pH9. ab97051, a HRP-conjugated goat anti-rabbit IgG H&L was used as the secondary antibody (1/500). Counter stained with hematoxylin.

Overlay histogram showing HeLa cells stained with unpurified ab32356 (red line). The cells were fixed with 80% methanol (5 min) and then permeabilized with 0.1% PBS-Tween for 20 min. The cells were then incubated in 1x PBS / 10% normal goat serum / 0.3M glycine to block non-specific protein-protein interactions followed by the antibody (ab32356, 1/100 dilution) for 30 min at 22ºC. The secondary antibody used was a goat anti-rabbit DyLight^® 488 (IgG; H+L) (ab96899) at 1/500 dilution for 30 min at 22ºC. Isotype control antibody (black line) was rabbit IgG (monoclonal) (1µg/1x10⁶ cells) used under the same conditions. Acquisition of >5,000 events was performed.