Date published: 2026-4-5

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BLM Antibody (B-4): sc-365753

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Datasheets
  • BLM Antibody (B-4) is a mouse monoclonal IgG2b κ BLM antibody, cited in 17 publications, provided at 200 µg/ml
  • raised against amino acids 1118-1417 of BLM of human origin
  • BLM Antibody (B-4) is recommended for detection of BLM of mouse, rat and human origin by WB, IP, IF and ELISA
  • Anti-BLM Antibody (B-4) is available conjugated to agarose for IP; HRP for WB, IHC(P) and ELISA; and to either phycoerythrin or FITC for IF, IHC(P) and FCM
  • also available conjugated to Alexa Fluor® 488, Alexa Fluor® 546, Alexa Fluor® 594 or Alexa Fluor® 647 for WB (RGB), IF, IHC(P) and FCM, and for use with RGB fluorescent imaging systems, such as iBright™ FL1000, FluorChem™, Typhoon, Azure and other comparable systems
  • also available conjugated to Alexa Fluor® 680 or Alexa Fluor® 790 for WB (NIR), IF and FCM; for use with Near-Infrared (NIR) detection systems, such as LI-COR®Odyssey®, iBright™ FL1000, FluorChem™, Typhoon, Azure and other comparable systems
  • m-IgG Fc BP-HRP, m-IgG2b BP-HRP and m-IgGκ BP-HRP are the preferred secondary detection reagents for BLM Antibody (B-4) for WB applications. These reagents are now offered in bundles with BLM Antibody (B-4) (see ordering information below).
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BLM Antibody (B-4) is a mouse monoclonal IgG2b kappa light chain antibody that detects BLM protein of mouse, rat, and human origin by western blotting (WB), immunoprecipitation (IP), immunofluorescence (IF), and enzyme-linked immunosorbent assay (ELISA). BLM (B-4) antibody is available in both non-conjugated and various conjugated forms, including agarose, horseradish peroxidase (HRP), phycoerythrin (PE), fluorescein isothiocyanate (FITC), and multiple Alexa Fluor® conjugates. BLM protein plays a crucial role in maintaining genomic stability by unwinding DNA during replication and repair processes, which is vital for preventing mutations that can lead to cancer. Mutations in BLM gene are associated with Bloom′s syndrome, an autosomal recessive disorder characterized by growth deficiencies, sun sensitivity, immunodeficiency, and a significantly increased risk of various cancers. One of the hallmark features of Bloom′s syndrome is the elevated frequency of sister chromatid exchange, which is linked to the impaired function of BLM protein in unwinding G4 DNA structures. BLM is predominantly located in the nucleus, where ATPase activity is activated by both single- and double-stranded DNA, highlighting an essential role in DNA metabolism. Additionally, the homologous yeast protein SGS1, which shares similarities with BLM, has been shown to cause mitotic hyperrecombination when mutated, further underscoring the importance of BLM in maintaining genomic integrity.

For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.

Alexa Fluor® is a trademark of Molecular Probes Inc., OR., USA

LI-COR® and Odyssey® are registered trademarks of LI-COR Biosciences

BLM Antibody (B-4) References:

  1. Replication protein A physically interacts with the Bloom's syndrome protein and stimulates its helicase activity.  |  Brosh, RM., et al. 2000. J Biol Chem. 275: 23500-8. PMID: 10825162
  2. BLM, the Bloom's syndrome protein, varies during the cell cycle in its amount, distribution, and co-localization with other nuclear proteins.  |  Sanz, MM., et al. 2000. Cytogenet Cell Genet. 91: 217-23. PMID: 11173860
  3. Cleavage of BLM and sensitivity of Bloom's syndrome cells to hydroxurea and UV-C radiation.  |  Ababou, M., et al. 2002. Cell Cycle. 1: 262-6. PMID: 12429945
  4. Stimulation of flap endonuclease-1 by the Bloom's syndrome protein.  |  Sharma, S., et al. 2004. J Biol Chem. 279: 9847-56. PMID: 14688284
  5. Syndrome-causing mutations of the BLM gene in persons in the Bloom's Syndrome Registry.  |  German, J., et al. 2007. Hum Mutat. 28: 743-53. PMID: 17407155
  6. Cellular defects caused by hypomorphic variants of the Bloom syndrome helicase gene BLM.  |  Shastri, VM. and Schmidt, KH. 2016. Mol Genet Genomic Med. 4: 106-19. PMID: 26788541
  7. The Bloom's syndrome gene product is homologous to RecQ helicases.  |  Ellis, NA., et al. 1995. Cell. 83: 655-66. PMID: 7585968
  8. Bloom syndrome: is the gene mapped to the point?  |  Bamezai, R. 1996. Indian J Exp Biol. 34: 298-301. PMID: 8698416
  9. SGS1, a homologue of the Bloom's and Werner's syndrome genes, is required for maintenance of genome stability in Saccharomyces cerevisiae.  |  Watt, PM., et al. 1996. Genetics. 144: 935-45. PMID: 8913739
  10. The Bloom's syndrome gene product is a 3'-5' DNA helicase.  |  Karow, JK., et al. 1997. J Biol Chem. 272: 30611-4. PMID: 9388193
  11. BLM (the causative gene of Bloom syndrome) protein translocation into the nucleus by a nuclear localization signal.  |  Kaneko, H., et al. 1997. Biochem Biophys Res Commun. 240: 348-53. PMID: 9388480
  12. The Bloom's syndrome helicase unwinds G4 DNA.  |  Sun, H., et al. 1998. J Biol Chem. 273: 27587-92. PMID: 9765292

Ordering Information

Product NameCatalog #UNITPriceQtyFAVORITES

BLM Antibody (B-4)

sc-365753
200 µg/ml
$322.00

BLM Antibody (B-4): m-IgG Fc BP-HRP Bundle

sc-529456
200 µg Ab; 10 µg BP
$361.00

BLM Antibody (B-4): m-IgGκ BP-HRP Bundle

sc-522353
200 µg Ab, 40 µg BP
$361.00

BLM Antibody (B-4): m-IgG2b BP-HRP Bundle

sc-550112
200 µg Ab; 10 µg BP
$361.00

BLM Antibody (B-4) AC

sc-365753 AC
500 µg/ml, 25% agarose
$424.00

BLM Antibody (B-4) HRP

sc-365753 HRP
200 µg/ml
$322.00

BLM Antibody (B-4) FITC

sc-365753 FITC
200 µg/ml
$336.00

BLM Antibody (B-4) PE

sc-365753 PE
200 µg/ml
$349.00

BLM Antibody (B-4) Alexa Fluor® 488

sc-365753 AF488
200 µg/ml
$364.00

BLM Antibody (B-4) Alexa Fluor® 546

sc-365753 AF546
200 µg/ml
$364.00

BLM Antibody (B-4) Alexa Fluor® 594

sc-365753 AF594
200 µg/ml
$364.00

BLM Antibody (B-4) Alexa Fluor® 647

sc-365753 AF647
200 µg/ml
$364.00

BLM Antibody (B-4) Alexa Fluor® 680

sc-365753 AF680
200 µg/ml
$364.00

BLM Antibody (B-4) Alexa Fluor® 790

sc-365753 AF790
200 µg/ml
$364.00

Your demonstrative blot shows 1 band for the first 3 samples and 2 bands for the last two samples. WHY? Which is is BLM the upper or lower band?

Asked by: Anonymous
Thank you for your question. BLM undergoes extensive post-translational modifications such as cross-linking and modification of several amino acid residues. This may cause additional bands to appear at a higher molecular weight on western blot images, depending on the sample used. If you have any issues with the results you produce with this antibody, please contact our Technical Service team so we can assist you.
Answered by: Tech Support Europe
Date published: 2020-06-15

What is the recommended fixation method for immunofluorescence staining with BLM (B-4): sc-365753 monoclonal antibody?

Asked by: Germaine
Thank you for your inquiry. We recommend fixing cells for 5 minutes in -10°C methanol and allowing to air dry. The full protocol can be viewed here: https://www.scbt.com/scbt/resources/protocols/immunofluorescence-cell-staining
Answered by: Technical Support
Date published: 2017-02-24
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Rated 4 out of 5 by from AcceptableAcceptable signal but several background bands when used in western blot of total human (Jurkat, K562, HL-60) cell extracts
Date published: 2021-05-31
Rated 5 out of 5 by from Good nuclear specifictyGreat signal seen localized to the nucleus of HepG2 cells when fixed with formalin and stained in IF.
Date published: 2017-02-08
Rated 4 out of 5 by from Good AntibodyIt works well in WB using HeLa, U2OS or HEK 293T cells. Works in IF too.
Date published: 2016-11-24
Rated 5 out of 5 by from Good specificity in WB in KGood specificity in WB in K-562 and HeLa nuclear extracts. -SCBT QC
Date published: 2015-04-07
Rated 5 out of 5 by from Strong band in WB in KStrong band in WB in K-562 nuclear extract. -SCBT QC
Date published: 2014-07-31
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BLM Antibody (B-4) is rated 4.6 out of 5 by 5.
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