Date published: 2026-5-17

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IgG Fab fragment Antibody (4A11): sc-51642

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Datasheets
  • IgG Fab fragment Antibody (4A11) is a mouse monoclonal IgG2b IgG Fab fragment antibody provided at 100 µg/ml
  • raised against the Fab fragment of IgG of human origin
  • recommended for detection of Fab fragments (regardless of light chain type) of human origin by WB
  • At present, we have not yet completed the identification of the preferred secondary detection reagent(s) for IgG Fab fragment Antibody (4A11). This work is in progress.
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    IgG Fab fragment Antibody (4A11) is a mouse monoclonal IgG2b kappa light chain antibody that detects the IgG Fab fragment protein of human origin by western blotting (WB). Anti-IgG Fab fragment antibody (4A11) is available as a non-conjugated format. IgG Fab fragment (4A11) antibody recognizes a crucial component involved in immune response, specifically in antigen binding. IgG Fab fragment originates from the IgG molecule, composed of two heavy chains and two light chains, forming distinct regions that facilitate antigen recognition. The Fab region enables specific binding to antigens, allowing immune system targeting and pathogen neutralization. IgG Fab fragments bind to diverse antigens from viruses, bacteria, and fungi, highlighting their significance in adaptive immunity. Structural integrity of Fab fragments maintains binding affinity and specificity, directly impacting immune response effectiveness. Anti-IgG Fab fragment antibody (4A11) enables researchers to investigate immune recognition mechanisms and antibody-mediated protection against infections.

    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

    IgG Fab fragment Antibody (4A11) References:

    1. Cloning and molecular characterization of a human recombinant IgG Fab binding to the Tat protein of human immunodeficiency virus type 1 (HIV-1) derived from the repertoire of a seronegative patient.  |  Mancini, N., et al. 2006. Mol Immunol. 43: 1363-9. PMID: 16199090
    2. F(ab')2 antibody fragments against Trypanosoma cruzi calreticulin inhibit its interaction with the first component of human complement.  |  Aguilar, L., et al. 2005. Biol Res. 38: 187-95. PMID: 16238097
    3. Effects of IgG and its F(ab')2 fragments of some patients with idiopathic thrombocytopenic purpura on platelet aggregation.  |  Chu, XX., et al. 2006. Eur J Haematol. 76: 153-9. PMID: 16405437
    4. Site-specific conjugation of bifunctional chelator BAT to mouse IgG1 Fab' fragment.  |  Li, J., et al. 2006. Acta Pharmacol Sin. 27: 237-41. PMID: 16412275
    5. Investigation of conformational changes induced by binding of pancreatic RNase to anti-RNase IgG derived Fab monomer using optical procedures.  |  Younus, H., et al. 2006. Biochemistry (Mosc). 71: 218-21. PMID: 16489928
    6. Comparison between therapeutic antitoxin F(ab)2 fractionated with ammonium sulfate and caprylic acid.  |  Redwan, el-RM. 2006. J Immunoassay Immunochem. 27: 319-29. PMID: 16981645
    7. Effector mechanisms in myasthenia gravis: end-plate function after passive transfer of IgG, Fab, and F(ab')2 hybrid molecules.  |  Sterz, R., et al. 1986. Muscle Nerve. 9: 306-12. PMID: 2423869
    8. Comparison of IgG Fab conjugates for bluetongue antibody detection by the ELISA.  |  Snydelaar Hardwicke, AC. and Carlson, JH. 1987. Rev Latinoam Microbiol. 29: 153-5. PMID: 2830650
    9. [Preparation and comparative evaluation of peroxidase conjugates based on pure antibodies and the IgG Fab fragment].  |  Marennikova, SS., et al. 1982. Zh Mikrobiol Epidemiol Immunobiol. 99-103. PMID: 6755989

    Ordering Information

    Product NameCatalog #UNITPriceQtyFAVORITES

    IgG Fab fragment Antibody (4A11)

    sc-51642
    100 µg/ml
    $322.00

    How much sample do you recommend loading on the gel for Western blot detection using IgG Fab fragment (4A11): sc-51642?

    Asked by: jenniferc
    We recommend loading 40–60 µg whole cell lysate, 10–20 µg nuclear extract, 5-10 µg transfected lysate, or 10–20 ng purified protein per lane. A link to our complete Western blotting protocol is provided here for your reference. https://www.scbt.com/scbt/resources/protocols/western-immuno-blotting
    Answered by: Technical Support
    Date published: 2017-03-27
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    Rated 5 out of 5 by from Good for Western Blot[Employee of scbt] This antibody can be used to detect the Fab fragment of human IgG by Western Blot. -SCBT QC
    Date published: 2023-09-14
    Rated 2 out of 5 by from per IHC è specifico ma poco sensibileI was interested in this antibody for IHC purposes (the datasheet clearly stated that the only available application was western blot). It’s very difficult to find a IgG Fab Fragment antibody suitable for IHC on FFPE and so I wanted to tried it. This antibody in my hands give a specific signal in nodal germinal centre plasma cells (antigen retrieval EDTA pH 8.0 in water bath at 98°C) but the sensitivity is too low compared to a common IgG polyclonal antibody.
    Date published: 2021-06-14
    Rated 5 out of 5 by from works wellI got a free sample to evaluate and it worked very well in both immunocytochemistry and flow cytometry. We will be ordering one vial today.
    Date published: 2017-11-01
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    IgG Fab fragment Antibody (4A11) is rated 3.5 out of 5 by 4.
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