Chk2 is the mammalian orthologue of the budding yeast Rad53 and fission yeast Cds1 checkpoint kinases (1-3).
The amino-terminal domain of Chk2 contains a series of seven serine or threonine residues (Ser19, Thr26, Ser28, Ser33, Ser35, Ser50, and Thr68) each followed by glutamine (SQ or TQ motif).
These are known to be preferred sites for phosphorylation by ATM/ATR kinases (4,5).
After DNA damage by ionizing radiation (IR), UV irradiation, or hydroxyurea treatment, Thr68 and other sites in this region become phosphorylated by ATM/ATR (5-7).
The SQ/TQ cluster domain, therefore, seems to have a regulatory function.
Phosphorylation at Thr68 is a prerequisite for the subsequent activation step, which is attributable to autophosphorylation of Chk2 at residues Thr383 and Thr387 in the activation loop of the kinase domain (8).
Applications:Suitable for use in Immunofluorescence, Western Blot, Immunoprecipitation, Immunohistochemistry, Immunocytochemistry.
Other applications not tested.
Recommended Dilution:Western Blot: 1:500-1:2000Immunohistochemistry: 1:50-1:200Immunocytochemistry: 1:50-1:200Immunofluorescence: 1:50-1:200Immunoprecipitation: 1:20-1:100Optimal dilutions to be determined by the researcher.
Storage and Stability:May be stored at 4°C for short-term only.
Aliquot to avoid repeated freezing and thawing.
Store at -20°C.
Aliquots are stable for 12 months after receipt.
For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.
仕様
Size：50ul
Host：rabbit
Source Antibody：human
Grade：Affinity Purified
Purity：Purified by affinity chromatography.
Form：Supplied as a liquid in PBS, pH 7.3, 0.02% sodium azide, 50% glycerol.
Specificity：Recognizes CHEK2. Species Crossreactivity: human, mouse, rat
Isotype：IgG
Calc Applications Abbrev：IC IF IHC IP WB
Calc Crossreactivity：Hu Mo Rt
Immunogen：Recombinant protein corresponding to human CHEK2.
