Chk1 Antibody


Biological Strategies: Western Blot: Chk1 Antibody [NB100-464] - Knockout of ORC2 in HCT116 p53-/- cells. Western blot of ORC2 in HBEC and 293T cell lines. Ponceau S staining of total protein or immunoblot of more
Immunohistochemistry-Paraffin: Chk1 Antibody [NB100-464] - Section of human breast carcinoma. Antibody: Affinity purified rabbit anti-CHK1 used at a dilution of 1:1,000 (1ug/ml). Detection: DAB
Biological Strategies: Western Blot: Chk1 Antibody [NB100-464] - Detection of Human Chk1 by Western Blot. Samples: Whole cell lysate (50 ug) from HeLa, 293T, Jurkat, and mouse TMCK cells. Antibodies: Affinity more
Immunoprecipitation: Chk1 Antibody [NB100-464] - Detection of human Chk1 by western blot of immunoprecipitates. Samples: Whole cell lysate (1 mg for IP; 20% of IP loaded) from HeLa cells. Antibodies: Affinity purified more
Depletion of NUSAP1 induces DNA damage in GBM cells. a Mini ontology obtained in French’s database using gene sets related to NUSAP1, which were identified by a significant difference of P < 0.001. b Tailed DNA in more
GRPs enhance axonal growth in DRGs in vitro. A–C, Representative montage images are shown for control dissociated DRG culture (A), dissociated DRGs cocultured with rat GRPs (B), and dissociated DRGs cultures exposed more

Product Details

Reactivity Hu, MuSpecies Glossary
Applications WB, IHC, IP
1.0 mg/ml
Validated by:

Biological Strategies


Chk1 Antibody Summary

This antibody can be used as the primary antibody in a PLA assay with the following as complementing antibodies: NB100-305, NB100-322, NB100-97831
The immunogen recognized by this antibody maps to a region between residues 250 and 300 of human Checkpoint Kinase 1 using the numbering given in SwissProt entry O14757 (GeneID 1111).
Immunogen affinity purified
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Test in a species/application not listed above to receive a full credit towards a future purchase.


  • Immunohistochemistry 1:1000-1:5000
  • Immunohistochemistry-Paraffin 1:1000-1:5000
  • Immunoprecipitation 2-10 ug/mg lysate
  • Western Blot 1:10000-1:25000
Application Notes
Epitope retrieval with Tris-EDTA pH 9.0 is recommended for FFPE tissue sections.
Theoretical MW
54 kDa.
Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.
Chk1 Overexpression Lysate
Read Publications using
NB100-464 in the following applications:

  • 3 publications
  • IP
    1 publication
  • WB
    6 publications

Reactivity Notes

Mouse reactivity reported in scientific literature (PMID: 29287241).

Packaging, Storage & Formulations

Store at 4C. Do not freeze.
Tris-Citrate/Phosphate (pH 7.0 - 8.0)
0.09% Sodium Azide
1.0 mg/ml
Immunogen affinity purified


This antibody can be used as the primary antibody in a PLA assay with the following as complementing antibodies: NB100-305, NB100-322, NB100-97831

Alternate Names for Chk1 Antibody

  • Checkpoint, S. pombe, homolog of, 1
  • CHEK1
  • CHK1 (checkpoint, S.pombe) homolog
  • CHK1 checkpoint homolog (S. pombe)
  • Chk1
  • CHK1serine/threonine-protein kinase Chk1
  • EC 2.7.11
  • EC


Cell cycle events are regulated by the sequential activation and deactivation of cyclin dependent kinases (Cdks) and by proteolysis of cyclins. Chk1 and Chk2 are involved in these processes as regulators of Cdks. Chk1 and Chk2 both function as essential components in the G2 DNA damage checkpoint by phosphorylating Cdc25C in response to DNA damage. Phosphorylation inhibits Cdc25C activity, thereby blocking mitosis. Cdc25A, Cdc25B and Cdc25C protein tyrosine phosphatases function as mitotic activators by dephosphorylating Cdc2 p34 on regulatory tyrosine residues. It has also been shown that Chk1 can phosphorylate Wee 1 in vitro, providing evidence that the hyperphosphorylated form of Wee 1, seen in cells delayed by Chk1 overexpression, is due to phosphorylation by Chk1. Chk1 is phosphorylated on Serine 345 (S345) in response to UV, IR and hydroxyurea (HU). Chk1 plays an essential role in the mammalian DNA damage checkpoint, embryonic development and tumor suppression.


This product is for research use only and is not approved for use in humans or in clinical diagnosis. Primary Antibodies are guaranteed for 1 year from date of receipt.

Publications for Chk1 Antibody (NB100-464)(12)

We have publications tested in 2 confirmed species: Human, Mouse.

We have publications tested in 3 applications: IF/IHC, IP, WB.

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Showing Publications 1 - 10 of 12. Show All 12 Publications.
Publications using NB100-464 Applications Species
Lee KY, Dutta A Chk1 promotes non-homologous end joining in G1 through direct phosphorylation of ASF1A Cell reports 2021-01-26 [PMID: 33503415] (IP, Human) IP Human
Morris BB, Wages NA, Grant PA, et al. MYBL2-Driven Transcriptional Programs Link Replication Stress and Error-prone DNA Repair With Genomic Instability in Lung Adenocarcinoma Frontiers in oncology 2020-01-08 [PMID: 33489883] (WB, Human) WB Human
Shibata, E & Dutta, A. A human cancer cell line initiates DNA replication normally in the absence of ORC5 and ORC2 proteins. J Biol Chem 2020-12-11 [PMID: 33453950] (IF/IHC, Human) IF/IHC Human
Shibata E, Dutta A A human cancer cell line initiates DNA replication normally in the absence of ORC5 and ORC2 proteins The Journal of biological chemistry 2020-12-11 [PMID: 32989049] (WB, Human) WB Human
Bai X, Wang J, Huo L et al. Serine/Threonine Kinase CHEK1-Dependent Transcriptional Regulation of RAD54L Promotes Proliferation and Radio Resistance in Glioblastoma. Transl Oncol 2017-12-26 [PMID: 29287241] (Mouse) Mouse
Shibata E, Kiran M, Shibata Y et al. Two subunits of human ORC are dispensable for DNA replication and proliferation Elife. 2016-11-30 [PMID: 27906128] (WB, Human) WB Human
Yun H, Shi R, Yang Q et al. Over expression of hRad9 protein correlates with reduced chemosensitivity in breast cancer with administration of neoadjuvant chemotherapy Sci Rep. 2014-12-17 [PMID: 25520248] (IF/IHC, Human) IF/IHC Human
Terai K, Shibata E, Abbas T, Dutta A. Degradation of p12 Subunit by CRL4Cdt2 E3 Ligase Inhibits Fork Progression after DNA Damage. J Biol Chem. 2013-10-18 [PMID: 24022480] (WB, Human) WB Human
Jazaeri AA, Shibata E, Park J et al. Overcoming platinum resistance in preclinical models of ovarian cancer using the neddylation inhibitor MLN4924. Mol Cancer Ther. 2013-08-12 [PMID: 23939375] (WB, Human) WB Human
Hong J, Hu K, Yuan Y et al. CHK1 targets spleen tyrosine kinase (L) for proteolysis in hepatocellular carcinoma J Clin Invest 2012-06-01 [PMID: 22585575] (WB, IF/IHC, Human) WB, IF/IHC Human
Show All 12 Publications.

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Gene Symbol CHEK1