Date published: 2026-4-27

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SEI-1 Antibody (3H4): sc-517080

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Datasheets
  • SEI-1 Antibody (3H4) is a mouse monoclonal IgG2a κ SEI-1 antibody provided at 100 µg/ml
  • raised against amino acids 1-236 representing full length SEI-1 of human origin
  • recommended for detection of SEI-1 of human origin by WB, IP, IF and ELISA
  • At present, we have not yet completed the identification of the preferred secondary detection reagent(s) for SEI-1 Antibody (3H4). This work is in progress.
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    SEI-1 Antibody (3H4) is a mouse monoclonal IgG2a kappa light chain antibody that detects SEI-1 protein of human origin by western blotting (WB), immunoprecipitation (IP), immunofluorescence (IF), and enzyme-linked immunosorbent assay (ELISA). SEI-1 (3H4) antibody is available as the non-conjugated form. SEI-1 protein, also known as SERTAD1 (SERTA domain containing 1) or TRIP-Br1 (Transcriptional regulator interacting with the PHD-bromodomain 1), plays a crucial role as a transcriptional regulator that integrates signals from various transcription factors. SEI-1 is particularly important for regulating gene expression at E2F-responsive promoters, where SEI-1 interacts with the PHD- and bromodomains of proteins such as TIF1 and DP-1, facilitating signal transmission to the promoter and enhancing transcriptional activity. SEI-1 forms a multiprotein complex with E2F-1 and DP-1, exhibiting varying expression levels throughout the cell cycle, which allows SEI-1 to effectively regulate cell cycle progression during the G1 and S phases. SEI-1 can also modulate the activity of the cyclin D-Cdk4 complex, making cyclin D-Cdk4 resistant to p16 inhibitory effects, thereby influencing cell cycle dynamics. Overexpression of SEI-1 has been linked to the development of squamous cell carcinomas of the head and neck, highlighting SEI-1′s potential role in cancer biology and making SEI-1 a significant target for research and therapeutic interventions.

    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

    SEI-1 Antibody (3H4) References:

    1. TRIP-Br: a novel family of PHD zinc finger- and bromodomain-interacting proteins that regulate the transcriptional activity of E2F-1/DP-1.  |  Hsu, SI., et al. 2001. EMBO J. 20: 2273-85. PMID: 11331592
    2. Identification of a candidate oncogene SEI-1 within a minimal amplified region at 19q13.1 in ovarian cancer cell lines.  |  Tang, TC., et al. 2002. Cancer Res. 62: 7157-61. PMID: 12499249
    3. TRIP-Br links E2F to novel functions in the regulation of cyclin E expression during cell cycle progression and in the maintenance of genomic stability.  |  Sim, KG., et al. 2004. Cell Cycle. 3: 1296-304. PMID: 15467469
    4. Oncogenic transformation by SEI-1 is associated with chromosomal instability.  |  Tang, DJ., et al. 2005. Cancer Res. 65: 6504-8. PMID: 16061626
    5. SEI family of nuclear factors regulates p53-dependent transcriptional activation.  |  Watanabe-Fukunaga, R., et al. 2005. Genes Cells. 10: 851-60. PMID: 16098148
    6. Dissection of CDK4-binding and transactivation activities of p34(SEI-1) and comparison between functions of p34(SEI-1) and p16(INK4A).  |  Li, J., et al. 2005. Biochemistry. 44: 13246-56. PMID: 16201750
    7. p21WAF1/CIP1 gene is inactivated in metastatic prostatic cancer cell lines by promoter methylation.  |  Bott, SR., et al. 2005. Prostate Cancer Prostatic Dis. 8: 321-6. PMID: 16276353
    8. The TRIP-Br family of transcriptional regulators is essential for the execution of cyclin E-mediated cell cycle progression.  |  Sim, KG., et al. 2006. Cell Cycle. 5: 1111-5. PMID: 16721052
    9. Transcriptional and subcellular regulation of the TRIP-Br family.  |  Lai, IL., et al. 2007. Gene. 388: 102-9. PMID: 17141982

    Ordering Information

    Product NameCatalog #UNITPriceQtyFAVORITES

    SEI-1 Antibody (3H4)

    sc-517080
    100 µg/ml
    $322.00

    I am using SEI-1 (3H4): sc-517080 for immunofluorescence, what dilution of this antibody should I use?

    Asked by: cjMara
    Thank you for your question. We recommend a starting dilution of 1:50. However, optimal antibody concentration should be determined by titration. Please find our full immunofluorescence protocol here: https://www.scbt.com/scbt/resources/protocols/immunofluorescence-cell-staining
    Answered by: Technical Support
    Date published: 2017-03-24
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    Rated 5 out of 5 by from Good for Western Blot and IFAntibody detects human recombinant SEI-1 by Western blot and human SEI-1 by immunofluorescense staining in Hela cells. -SCBT QC
    Date published: 2023-09-14
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    SEI-1 Antibody (3H4) is rated 5.0 out of 5 by 1.
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