Exalpha Biologicals, Inc.

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Exalpha Biologicals, Inc. is now a US distributor for Nordic-Mubio products

Nordic-MUbio develops and manufactures high quality antibody reagents for use in R&D. All our products are manufactured according to strict ISO 9001 quality guidelines, and our focus is on developing antibodies targetting Cell Adhesion, Nuclear and Cytoskeletal Proteins.

Nordic-MUbio is one of the leading antibody companies developing antibodies for zebrafish research – we currently have over 50 antibodies validated for immunofluorescence in zebrafish.

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Akazawa, Y., et al. "Endoplasmic Reticulum Stress Contributes to Helicobacter Pylori VacA-Induced Apoptosis" PLoS ONE 8(12): e82322

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Homa, N.J., et al. "Epstein-Barr Virus Induces Global Changes in Cellular mRNA Isoform Usage That Are Important for the Maintenance of Latency" J. Virol., 2013, 87, 12291-12301

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Exalpha Biologicals, Inc.

Histone H2A.x (S140)

  • Product Code: X2754P
  • Size: 100 µg
  • Availability: In Stock In Stock
  • Price (USD): $355

Cat #

X2754P		 Quantity:      

Data Sheet

Product Name

Histone H2A.x (S140)







Product Type

Antigen Immunoaffinity Purified Polyclonal




Western blot, Immunohistochemistry, EIA


Antigen Immunoaffiinity Purification


100 µg

Price (USD)



Variant histone H2A which replaces conventional H2A in a subset of nucleosomes. Nucleosomes wrap and compact DNA into chromatin, limiting DNA accessibility to the cellular machineries which require DNA as a template. Histones thereby play a central role in transcription regulation, DNA repair, DNA replication and chromosomal stability. DNA accessibility is regulated via a complex set of post-translational modifications of histones, also called histone code, and nucleosome remodeling. 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.


Synthetic peptide derived from human histone H2a.x protein. Sequence is unphosphorylated version of peptide used for Cat. No. X2752P


Provided as solution in phosphate buffered saline with 0.08% sodium azide

Customer Storage

Product should be stored at -20°C. Aliquot to avoid freeze/thaw cycles

Product Image

Image Legend

Immunohistochemical staining of FFPE human bladder carcinoma tissue using Histone H2A.x (S140) antibody (Cat. No. X2754P). Antibody used at 1 µg/ml and visualized using DAB. Pathologists comments: Positive cytoplasmic staining on cancer cells.

Database Links:



1. Paull, T.T., et al. ?A critical role for histone H2AX in recruitment of repair factors to nuclear foci after DNA damage? Curr. Biol., 10, 886-895 (2000)

2. Kobayashi, J., et al. ?NBS1 localizes to gamma-H2AX foci through interaction with the FHA/BRCT domain.? Curr. Biol., 12, 1846-1851 (2002)

3. Stewart, G.S., et al. ?MDC1 is a mediator of the mammalian DNA damage checkpoint.? Nature, 421, 961-966 (2003)

4. Lukas, C., et al. ?Mdc1 couples DNA double-strand break recognition by Nbs1 with its H2AX-dependent chromatin retention.? EMBO J., 23, 2674-2683 (2004)