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C9358 Sigma

Monoclonal Anti-Chk1 antibody produced in mouse

~2 mg/mL, clone DCS-310, purified immunoglobulin, buffered aqueous solution



Related Categories Alphabetical Index, Antibodies, Antibodies for Cell Biology, Antibodies for Cell Cycle, Antibodies for Hematopoietic Stem Cells,
species reactivity   human
application(s)   immunohistochemistry (formalin-fixed, paraffin-embedded sections): suitable
  immunoprecipitation: suitable
  microarray: suitable
  western blot: 1-2 μg/mL using whole extract of cultured 293T (human embryonal kidney) cells
clone   DCS-310, monoclonal
concentration   ~2 mg/mL
antibody form   purified immunoglobulin
form   buffered aqueous solution
isotype   IgG2b
mol wt   antigen mol wt 54 kDa
shipped in   dry ice
storage temp.   −20°C
Gene Information   human ... CHEK1(1111)
biological source   mouse
conjugate   unconjugated



recombinant human Chk1.

General description

The protein encoded by this gene is a serine/threonine-protein kinase with a molar mass of 54 kDa, that acts as a cell cycle checkpoint regulator.

Physical form

Solution in 0.01 M phosphate buffered saline, pH 7.4, containing 15 mM sodium azide.


Monoclonal Anti-Chk1 antibody produced in mouse is suitable for immunohistochemistry (formalin-fixed, paraffin-embedded sections), immunoprecipitation, microarray and western blot at a working concentration of 1-2 μg/mL using whole extract of cultured 293T (human embryonal kidney) cells. It was used for immunohistochemistry in a study to investigate the specific role of Chk1 phosphorylations in cell survival and checkpoint activation. It was used for immunohistochemistry at a working dilution of 1:4000 in a study to explore Chk1 knockdown as a novel therapeutic approach to arrest cell-cycle progression in MM cells, thus increasing the rate of cell death. It was used for the immunoprecipitation and detection of total Chk1 by western blot to study a possible regulatory relationship between Chk1 and CK1, a member of the casein kinase 1 family.

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Biochem/physiol Actions

The protein propagates signals from damaged or unreplicated DNA. It is expressed and active only in S-G2 phases of the cell cycle. In response to DNA damage, it phosphorylates CDC25C at Ser 216, thus preventing activation of the Cdc2-cyclin B complex and mitotic entry, blocking cell cycle progression. This protein acts to integrate signals from ATM and ATR, two cell cycle proteins involved in DNA damage responses, that also associate with chromatin in meiotic prophase I. Chk1 can phosphorylate Wee1, a negative regulator of G2 to M transition.

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Safety Information

RIDADR  NONH for all modes of transport
WGK Germany  nwg
Protocols & Articles

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Keywords: Amplification, Buffers, Cell biology, Enzyme-linked immunosorbent assay, Immunofluorescence, Immunohistochemistry, Inflammation, Molecular biology, Phosphorylations, Purification, Western blot

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