Date published: 2026-3-17

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Sp4 Antibody (B-1): sc-390124

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Datasheets
  • Sp4 Antibody (B-1) is a mouse monoclonal IgG1 κ Sp4 antibody, cited in 10 publications, provided at 200 µg/ml
  • raised against amino acids 171-440 of Sp4 of human origin
  • Sp4 Antibody (B-1) is recommended for detection of Sp4 of mouse, rat and human origin by WB, IP, IF, IHC(P) and ELISA
  • Anti-Sp4 Antibody (B-1) 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
  • TransCruz reagent for ChIP application (sc-390124 X, 200 µg/0.1 ml)
  • m-IgG Fc BP-HRP and m-IgG1 BP-HRP are the preferred secondary detection reagents for Sp4 Antibody (B-1) for WB and IHC(P) applications. These reagents are now offered in bundles with Sp4 Antibody (B-1) (see ordering information below).
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Sp4 Antibody (B-1) is a mouse monoclonal IgG1 kappa light chain antibody that detects Sp4 protein of mouse, rat, and human origin by western blotting (WB), immunoprecipitation (IP), immunofluorescence (IF), immunohistochemistry, and enzyme-linked immunosorbent assay (ELISA). Sp4 (B-1) 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. Sp4, a member of the Sp transcription factor family, plays a crucial role in regulating gene expression, particularly in the brain, where Sp4 is abundantly expressed. Sp4 is essential for neuronal development and function, influencing the transcription of genes involved in synaptic plasticity and neuronal signaling. Sp transcription factors, including Sp1, Sp2, Sp3, and Sp4, share a highly conserved DNA-binding domain characterized by three zinc fingers at the C-terminus, allowing binding to specific DNA sequences known as GC boxes. While Sp1, Sp3, and Sp4 exhibit a high affinity for these GC boxes, Sp2 has a weaker interaction, binding primarily to GT boxes. Sp4′s unique expression pattern and interactions with other transcription factors underscore Sp4′s importance in the regulation of neuronal genes, making anti-Sp4 antibody (B-1) a valuable tool for researchers studying gene regulation in the nervous system.

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

Sp4 Antibody (B-1) References:

  1. Cloning of GT box-binding proteins: a novel Sp1 multigene family regulating T-cell receptor gene expression.  |  Kingsley, C. and Winoto, A. 1992. Mol Cell Biol. 12: 4251-61. PMID: 1341900
  2. Cloning by recognition site screening of two novel GT box binding proteins: a family of Sp1 related genes.  |  Hagen, G., et al. 1992. Nucleic Acids Res. 20: 5519-25. PMID: 1454515
  3. Regulation of neurotrophin-3 gene transcription by Sp3 and Sp4 in neurons.  |  Ishimaru, N., et al. 2007. J Neurochem. 100: 520-31. PMID: 17059557
  4. Association of the Asn306Ser variant of the SP4 transcription factor and an intronic variant in the beta-subunit of transducin with digenic disease.  |  Gao, YQ., et al. 2007. Mol Vis. 13: 287-92. PMID: 17356515
  5. Over-representation of potential SP4 target genes within schizophrenia-risk genes.  |  Zhou, X. 2022. Mol Psychiatry. 27: 849-854. PMID: 34750502
  6. Coexisting autoantibodies against transcription factor Sp4 are associated with decreased cancer risk in patients with dermatomyositis with anti-TIF1γ autoantibodies.  |  Hosono, Y., et al. 2023. Ann Rheum Dis. 82: 246-252. PMID: 36008132
  7. The FOXP4-AS1/miR-3130-3p/SP4 feedback loop is associated with prostate cancer.  |  Gu, T., et al. 2022. Cell Mol Biol (Noisy-le-grand). 68: 161-166. PMID: 37114256
  8. SP4 Facilitates Esophageal Squamous Cell Carcinoma Progression by Activating PHF14 Transcription and Wnt/Β-Catenin Signaling.  |  Wei, L., et al. 2024. Mol Cancer Res. 22: 55-69. PMID: 37768180
  9. Functional analyses of the transcription factor Sp4 reveal properties distinct from Sp1 and Sp3.  |  Hagen, G., et al. 1995. J Biol Chem. 270: 24989-94. PMID: 7559627
  10. Sp1-mediated transcriptional activation is repressed by Sp3.  |  Hagen, G., et al. 1994. EMBO J. 13: 3843-51. PMID: 8070411
  11. Human Sp3 transcriptional regulator gene (SP3) maps to chromosome 2q31.  |  Kalff-Suske, M., et al. 1996. Genomics. 37: 410-2. PMID: 8938460
  12. Sp1 and Sp3 regulate expression of the neuronal nicotinic acetylcholine receptor beta4 subunit gene.  |  Bigger, CB., et al. 1997. J Biol Chem. 272: 25976-82. PMID: 9325332

Ordering Information

Product NameCatalog #UNITPriceQtyFAVORITES

Sp4 Antibody (B-1)

sc-390124
200 µg/ml
$322.00

Sp4 Antibody (B-1): m-IgG Fc BP-HRP Bundle

sc-527616
200 µg Ab; 10 µg BP
$361.00

Sp4 Antibody (B-1): m-IgG1 BP-HRP Bundle

sc-532989
200 µg Ab; 20 µg BP
$361.00

Sp4 Antibody (B-1) X

sc-390124 X
200 µg/0.1 ml
$322.00

Sp4 Antibody (B-1) AC

sc-390124 AC
500 µg/ml, 25% agarose
$424.00

Sp4 Antibody (B-1) HRP

sc-390124 HRP
200 µg/ml
$322.00

Sp4 Antibody (B-1) FITC

sc-390124 FITC
200 µg/ml
$336.00

Sp4 Antibody (B-1) PE

sc-390124 PE
200 µg/ml
$349.00

Sp4 Antibody (B-1) Alexa Fluor® 488

sc-390124 AF488
200 µg/ml
$364.00

Sp4 Antibody (B-1) Alexa Fluor® 546

sc-390124 AF546
200 µg/ml
$364.00

Sp4 Antibody (B-1) Alexa Fluor® 594

sc-390124 AF594
200 µg/ml
$364.00

Sp4 Antibody (B-1) Alexa Fluor® 647

sc-390124 AF647
200 µg/ml
$364.00

Sp4 Antibody (B-1) Alexa Fluor® 680

sc-390124 AF680
200 µg/ml
$364.00

Sp4 Antibody (B-1) Alexa Fluor® 790

sc-390124 AF790
200 µg/ml
$364.00

I also use this antibody and got clear bands in WB; however, I didn't detect fluorescence signal in IFA. If possible, could you tell me the detail protocol to perform immunofluorescence staining of formalin-fixed A-431 cells as described above?

Asked by: NH001
Thank you for your question. Here is a link to the recommended protocol for IF. For this antibody we recommend a starting dilution of 1:50. https://www.scbt.com/resources/protocols/immunofluorescence-cell-staining Please contact Technical Service or your local distributor for any further assistance with this antibody.
Answered by: Tech Service
Date published: 2019-10-08

I am using Sp4 (B-1): sc-390124 monoclonal antibody to stain paraffin embedded tissue. Do you recommend antigen retrieval when using this antibody?

Asked by: DefinitelyNotMatt
We recommend performing antigen retrieval with sodium citrate buffer (pH 6) and heat. The full protocol can be found here: https://www.scbt.com/scbt/resources/protocols/immunoperoxidase-staining
Answered by: Technical Support
Date published: 2017-02-25
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Rated 5 out of 5 by from Great choice for Western BlotThis antibody detects a band at the expected molecular weight in many human, mouse, and rat cell lysates. -SCBT QC
Date published: 2023-09-14
Rated 5 out of 5 by from Clear bands!I got clear bands,using 20uL of the antibody in 7mL 3% BSA solution
Date published: 2019-02-04
Rated 5 out of 5 by from GoodSpecific bands and no background. Used for pancreatic cancer cells
Date published: 2017-04-10
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Sp4 Antibody (B-1) is rated 5.0 out of 5 by 4.
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