Anti-phospho-Histone H2A.X (Ser139) Antibody, clone JBW301

The histone H2A.X protein is a variant member of the H2A family of histones that is distinguished from other H2A histones by a unique carboxy-terminal sequence. This unique sequence is highly conserved throughout eukaryotic evolution and is rapidly phosphorylated by ATM or ATR at the fourth residue from the carboxy-terminus (Serine 139 in mammalian H2A.X) in response to DNA double-strand breaks (DSBs). Phosphorylation of H2A.X is important in the formation of a stable repair complex at the site of DNA damage.
H2A.X phosphorylation is a very rapid response to DNA damage, occurring within as little as one minute after exposure to ionizing radiation. Phosphorylation of H2A.X occurs irrespective of the cause of the DNA DSBs and phospho-H2A.X has been observed in response to environmental stresses that result in DSBs as well as programmed cellular events, including DNA rearrangement and apoptosis.

~17 kDa observed. Uncharacterized band(s) may appear in some lysates.

KLH-conjugated linear peptide corresponding to human phospho-Histone H2A. X (Ser139).

Anti-phospho-Histone H2A.X (Ser139) Antibody, clone JBW301 is a highly specific mouse monoclonal antibody, that targets Histone H2A.X & has been tested in western blotting, ICC, ChIP & Immunofluorescence.

Immunocytochemistry Analysis: A 1:50-250 dilution from a representative lot detected phospho-Histone H2A. X (Ser139) in HeLa and A431 cells.
Previous lot has been demonstrated to work in Immunofluorescence and Chromatin Immunoprecipitation: See reference (Meier, Andreas et al., 2007)
Western Blotting Analysis: 0.05-1 μg/mL of this lot detected phosphorylated histone H2A.X (Ser139) in acid extracted histone lysates from Jurkat cells treated with 0.5 μM staurosporine (Catalog # 19-123).
Immunocytochemistry: 2 μg/mL of a previous lot of antibody detected phosphorylated histone H2A.X in HeLa cells treated with 0.5μM staurosporine for 4-6 hours.

Research Category
Epigenetics & Nuclear Function

Research Sub Category
Histones

Format: Purified

Protein G Purified

Purified mouse monoclonal IgG1κ in buffer containing 0.1 M Tris-Glycine (pH 7.4), 150 mM NaCl with 0.05% sodium azide.

Stable for 1 year at 2-8°C from date of receipt.

Evaluated by Western Blotting in HeLa cell lysate.

Western Blotting Analysis: 0.5 µg/mL of this antibody detected phospho-Histone H2A. X (Ser139) in 200 µg in staurosporine treated HeLa cells.

Concentration: Please refer to the Certificate of Analysis for the lot-specific concentration.

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