Histone H3K27ac antibody (pAb)

Catalog No: 39133 Format: 100 µg $510 Buy
Catalog No: 39134 Format: 10 µg $125 Buy
Catalog No: 39034 Format: 50 µg $295 Buy

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Antibody Type:
Protein A Chromatography
Molecular Weight:
17 kDa
Budding Yeast, Human, Wide Range Predicted


CUT&RUN Validated CUT&Tag Validated ChIP Validated ChIP-Seq Validated Western Blot Validated Immunofluorescence Validated Dot Blot Validated Immunohistochemistry Validated Immunocytochemistry Validated

Application Notes

Applications Validated by Active Motif:
ChIP: 10 µg per ChIP
ChIP-Seq: 5 µg each
ICC/IF: 1 - 5 µg/ml dilution
WB*: 0.1 - 1 µg/ml dilution
CUT&Tag: 1 µg per 50 µl reaction*

*This antibody has been validated for CUT&Tag using Active Motif's CUT&Tag-IT™ Assay Kit, Catalog No. 53160.

*Note: many chromatin-bound proteins are not soluble in a low salt nuclear extract and fractionate to the pellet. Therefore, we recommend a High Salt / Sonication Protocol when preparing nuclear extracts for Western blot.

modENCODE validation: this antibody was validated for ChIP-Seq in this study (see references).

NGS-QC® certification: this antibody has been processed by the NGS-QC® generator.

Published Applications

The following applications have been published using this antibody. Unless noted above, Active Motif may not have validated the antibody for use in these applications:

ChIP, ChIP-Seq
Native ChIP, CUT&Tag, CUT&RUN
Proximity Ligation Assay (PLA)

View publications that use Active Motif products & services here. Enter the product number(s) to see publications & applications that use this antibody.


This Histone H3 acetyl Lys27 antibody was raised against a peptide including acetyl-lysine 27 of histone H3.


Purified IgG in 10 mM sodium phosphate (pH 7.5), 150 mM NaCl, 30% glycerol, 0.035% sodium azide. Sodium azide is highly toxic. For your convenience, an unpurified serum version (Catalog No. 39135) of this antibody is also available.


Histone H3K27ac antibody (pAb) - 100 µg (Cat. No. 39133)


Histone H3K27ac antibody (pAb) - 10 µg (Cat. No. 39134)



Histone H3K27ac antibody (pAb) tested by ChIP-Seq
Chromatin immunoprecipitation (ChIP) was performed using the ChIP-IT® High Sensitivity Kit (Cat. No. 53040) with 30 µg of HAP1 myeloid leukemia cell chromatin and 4 µg of Histone H3K27ac antibody. ChIP DNA was sequenced on the Illumina NextSeq and 17 million sequence tags were mapped to identify Histone H3K27ac binding sites on chromosome 2.

Histone H3 acetyl Lys27 antibody tested by ChIP qPCR analysis.
ChIP was performed using the ChIP-IT® High Sensitivity Kit (Cat. No. 53040) with chromatin from a human hepatocyte cell line. qPCR was performed using a negative control primer set (Untr20) and three positive control primer sets that amplify known H3K27Ac sites.

Histone H3 acetyl Lys27 antibody tested by immunofluorescence.
Staining of HEK293 cells with Histone H3 acetyl Lys27 antibody (1 µg/ml dilution, top panel) and DAPI (bottom panel).

Histone H3K27ac antibody tested by Western blot.
20 µg of Raji cell nuclear extract was probed with Histone H3K27ac polyclonal antibody at 1 µg/ml
Lane 1: No treatment.
Lane 2: Cells treated with sodium butyrate.

Histone H3K27ac antibody tested by dot blot analysis.
Dot blot analysis was used to confirm the specificity of Histone H3K27ac antibody. Acetylated peptides were spotted onto PVDF and probed with antibody at 0.5 µg/ml. The amount of peptide (picomoles) spotted is indicated on the left.
Column 1: H3K37ac. Column 2: Unmodified H3K37. Column 3: H3K36ac. Column 4: H3K9ac. Column 5: H3K14ac. Column 6: H3K18ac. Column 7: H3K23ac. Column 8: H3K27ac. Column 9: H4K5ac. Column 10: H4K8ac. Column 11: H4K12ac. Column 12: H4K16ac.


Histone H3 is one of the core components of the nucleosome. The nucleosome is the smallest subunit of chromatin and consists of 147 base pairs of DNA wrapped around an octamer of core histone proteins (two each of Histone H2A, Histone H2B, Histone H3 and Histone H4). Histone H1 is a linker histone, present at the interface between the nucleosome core and DNA entry/exit points; it is responsible for establishing higher-order chromatin structure. Chromatin is subject to a variety of chemical modifications, including post-translational modifications of the histone proteins and the methylation of cytosine residues in the DNA. Reported histone modifications include acetylation, methylation, phosphorylation, ubiquitylation, glycosylation, ADP-ribosylation, carbonylation and SUMOylation; they play a major role in regulating gene expression.

Lysine N-ε-acetylation is a dynamic, reversible and tightly regulated protein and histone modification that plays a major role in chromatin remodeling and in the regulation of gene expression in various cellular functions. Acetylation of histone H3 occurs at several different lysine positions in the histone tail, and is performed by Histone Acetyltransferases (HATs) such as CBP/p300. Acetylation of histone H3 at Lys27 is associated with transcriptional activation.

Histone H3K27 can also be mono-, di- or trimethylated by different histone methyltransferases, such as EZH2 or NSD3. While histone methylation can be associated with transcriptional activation or repression, methylation of Lysine 27 of histone H3 is mainly associated with transcriptional repression.

Positive Control

Active Motif's HeLa acid extract (Sodium butyrate treated) (Catalog No. 36202) can be used as a positive control for Histone H3 acetyl Lys27 antibody.

Chromatin IP Assays

This antibody has been validated for use in ChIP and/or ChIP-Seq, and can be used with Active Motif's ChIP-IT® High Sensitivity Kit or our magnetic bead-based ChIP-IT® Express Kits. For an overview of all of our ChIP products, please visit our Chromatin IP Page to learn about ChIP products designed for use with Histone H3K27ac antibody (pAb).


Some products may be shipped at room temperature. This will not affect their stability or performance. Avoid repeated freeze/thaw cycles by aliquoting items into single-use fractions for storage at -20°C for up to 2 years. Keep all reagents on ice when not in storage.


This product is guaranteed for 12 months from date of receipt.

This product is for research use only and is not for use in diagnostic procedures.

Application Key

  • ChIP = Chromatin Immunoprecipitation;
  • ChIP = ChIP Sequencing;
  • CUT&RUN = Cleavage Under Targets and Release Using Nuclease;
  • CUT&Tag = Cleavage Under Targets and Tagmentation;
  • DB = Dot Blot;
  • ELISA = Enzyme-linked Immunosorbent Assay;
  • EMSA = Electrophoretic Mobility Shift Assay
  • FC = Flow Cytometry;
  • ICC = Immunocytochemistry;
  • IF = Immunofluorescence;
  • IHC = Immunohistochemistry;
  • IP = Immunoprecipitation;
  • MeDIP = Methyl-DNA Immunoprecipitation;
  • NEU = Neutralizing;
  • WB = Western Blotting