Histone H2BK120ac antibody (pAb)

Aliases: Histone H2B acetyl-lysine 120
Catalog No: 39119 Format: 200 µl $445 Buy
Catalog No: 39120 Format: 10 µl $105 Buy

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Antibody Type:
Molecular Weight:
15 kDa
Human, Other (Wide Range)


ChIP Validated ChIP-Seq Validated Western Blot Validated Immunofluorescence Validated Dot Blot Validated

Application Notes

Validated Applications:
ChIP: 10 µl per ChIP
ChIP-Seq: 5 µl each
WB: 1:1,000 - 1:2,000 dilution
IF: 1:500 dilution

Published Applications:
ChIP, ChIP-Seq

The modENCODE and NIH Roadmap Epigenomics Mapping Consortiums have implemented rigorous standardization criteria for all assays and reagents to be used. As part of this initiative, antibody specificity testing and the ability of the antibodies to work in ChIP-Seq were assessed in a large-scale study. This Histone H2B acetyl Lys120 antibody was validated for ChIP-Seq in the study (see reference).

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. 


This Histone H2B acetyl Lys120 antibody was raised against a peptide including acetyl-lysine 120 of human histone H2B.


Rabbit serum containing 30% glycerol and 0.035% sodium azide. Sodium azide is highly toxic.

View our Guide to Histone Modifications and Biological Function.


Histone H2BK120ac antibody (pAb) tested by ChIP-Seq.

Histone H2B acetyl Lys120 pAb tested by ChIP-Seq.
ChIP was performed using chromatin from the H1 human embryonic stem cell line. ChIP DNA was sequenced on the Illumina GA II and sequence tags were mapped to identify H2BK120Ac binding. The image shows H2BK120Ac binding in and around the IGSF21 gene on chromosome 1.

Histone H2BK120ac antibody (pAb) tested by ChIP.

Histone H2B acetyl Lys120 pAb tested by ChIP analysis.
Chromatin IP performed using the ChIP-IT® Express Kit (Catalog No. 53008) and HeLa Chromatin (1.5 x 106 cell equivalents per ChIP) using 10 µl of Histone H2B acetyl Lys120 pAb or the equivalent amount of rabbit IgG as a negative control. Real time, quantitative PCR (RT-qPCR) was performed on DNA purified from each of the ChIP reactions using a primer pair specific for the indicated gene. Data are presented as Fold Enrichment of the ChIP antibody signal versus the negative control IgG using the ddCT method.

Histone H2BK120ac antibody (pAb) tested by Western blot.

Histone H2B acetyl Lys120 pAb tested by Western blot.
HeLa acid extract (5 µg per lane) was probed with Histone H2B acetyl Lys120 polyclonal antibody (1:2,000 dilution).
    Lane 1: Human recombinant H2B (200 ng).
    Lane 2: No treatment.
    Lane 3: Cells treated with sodium butyrate.

Histone H2BK120ac antibody (pAb) tested by dot blot analysis.

Histone H2B acetyl Lys120 pAb tested by dot blot analysis.
Specificity Data: Dot blot analysis was used to confirm the specificity of Histone H2B acetyl Lys120 pAb for acetyl-Lys 120 of histone H2B. Decreasing amounts of modified and unmodified peptides were spotted onto PVDF and probed with the antibody at a dilution of 1:2,000.
    Lane 1: Peptide acetylated at lysine 5 of H2B.
    Lane 2: Unmodified lysine 5 peptide.
    Lane 3: Peptide acetylated at lysine 16 of H2B.
    Lane 4: Unmodified lysine 16 peptide.
    Lane 5: Peptide acetylated at lysine 120 of H2B.
    Lane 6: Unmodified lysine 120 peptide.

Histone H2BK120ac antibody (pAb) tested by immunofluorescence.

Detection of H2BK120ac by immunofluorescence
U2OS cells were stained with H2BK120ac antibody at a dilution of 1:500. Left panel: DAPI. Middle panel: H2BK120ac antibody staining. Right panel: merge.


Histone H2B 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). 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; these modifications 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. Histone H2A and Histone H2B are acetylated in bulk chromatin by p300 and form acetylated Histone H2A/Histone H2B heterodimers. When DNA associates with intact core histone octamers that contain acetylated H2A/H2B dimers, the inhibition of transcriptional initiation significantly decreases, indicating that acetylation of their lysine residues may mediate transcription.

Positive Control

Active Motif's HeLa acid extract (Sodium butyrate treated) (Catalog No. 36202) can be used as a positive control for Histone H2B acetyl Lys120 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 H2BK120ac antibody (pAb).

Compatible Secondary Antibodies

Active Motif has developed a variety of high-quality secondary antibodies for most applications, with anti-rabbit and anti-mouse conjugates to a broad line of high-quality fluorescent molecules, as well as horse radish peroxidase (HRP). Visit our Secondary Antibody Conjugates page to find the perfect secondaries for immunofluorescence experiments with Histone H2BK120ac antibody (pAb).


Some products may be shipped at room temperature. This will not affect their stability or performance. Upon receipt, unconjugated antibodies may be stored at -20°C for up to 2 years. Fluorophore- & enzyme-conjugated antibodies should be stored at 4°C. Fluorophore-conjugated antibodies should be protected from light. Keep reagents on ice when not in storage; to avoid repeated freeze/thaw cycles, we recommend aliquoting items that will be stored frozen into single-use fractions prior to freezing.


This product is guaranteed for 6 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;
  • 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;
  • TR-FRET = Time-Resolved Fluorescence Resonance Energy Transfer;
  • WB = Western Blotting