Histone H2A.XY142ph antibody (pAb)

Catalog No: 61617 Format: 100 µl $435 Buy
Catalog No: 61618 Format: 10 µl $105 Buy

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


Western Blot Validated Dot Blot Validated

Application Notes

Validated Applications:
WB: 1:500 - 1:1,000 dilution

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 antibody was raised against a peptide containing phospho-tyrosine 142 of human histone H2A.X.


Purified IgG in PBS with 30% glycerol and 0.035% sodium azide. Sodium azide is highly toxic.

View our Guide to Histone Modifications and Biological Function.


Histone H2A.XY142ph antibody (pAb) tested by Western blot.

Histone H2A.XY142ph antibody (pAb) tested by Western blot.
25 µg of U2OS nuclear extract untreated (lanes 1, 3, 5) or treated with 5 µM camptothecin for 8 hours (lanes 2, 4, 6) probed with the indicated antibody.
Lanes 1 & 2: H2A.XY142ph antibody (pAb) at a 1:500 dilution (expected decrease with treatment).
Lanes 3 & 4: H2A.X antibody (pAb), catalog no 39689 at a 1:50,000 dilution (no change expected).
Lanes 5 & 6: H2A.XS139ph antibody (pAb), catalog no 39117 at a 1:20,000 dilution (increase expected with treatment).

Histone H2A.XY142ph antibody (pAb) tested by dot blot analysis.

Histone H2A.XY142ph antibody (pAb) tested by dot blot analysis.
Dot blot analysis was used to confirm the specificity of Histone H2A.XY142ph antibody for phospho Tyr142 of Histone H2A.X. Peptides corresponding to the immunogen and the unmodified version of the immunogen were spotted onto PVDF and probed with the antibody at 1:100,000. The amount of peptide (picomoles) spotted is indicated next to each row.
    Lane 1: Phospho-Tyr142 peptide.
    Lane 2: Unmodified Tyr142 peptide.
    Lane 3: Phospho-Ser139 peptide.
    Lane 4: Unmodified Ser139 peptide.


Histone H2A.XY142ph (H2A histone family member X) replaces conventional H2A in a subset of nucleosomes. Nucleosomes wrap and compact DNA into chromatin, limiting DNA accessibility to the cellular machineries that require DNA as a template. Histones thereby play a central role in transcriptional regulation, DNA repair, DNA replication and chromosomal stability. DNA accessibility is regulated via a complex set of post-translational modifications of histones, also called the histone code, and nucleosome remodeling. Histone H2AX is required for checkpoint-mediated arrest of cell cycle progression in response to low doses of ionizing radiation, and for efficient repair of DNA double-strand breaks (DSBs), specifically when modified by C-terminal phosphorylation. Tyrosine phosphorylation at position 142 on Histone H2A.X is constitutive and is mediated by BAZ1B/WSTF. This mark distinguishes between apoptotic and DNA repair responses to genotoxic stress.


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