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Render Timestamp: 2024-11-20T11:17:24.929Z
Commit: 5c4accf06eb7154018ba3f54329c7590f97f534a
XML generation date: 2024-05-10 06:29:29.207
Product last modified at: 2024-11-08T20:30:08.637Z
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PDP - Template Name: Monoclonal Antibody (Alexa Fluor Conjugate)
PDP - Template ID: *******c8ce56b
R Recombinant
Recombinant: Superior lot-to-lot consistency, continuous supply, and animal-free manufacturing.

G4S Linker (E7O2V) F(ab')2 Fragment (Alexa Fluor® 647 Conjugate) #42709

Filter:
  • F

    Supporting Data

    REACTIVITY All
    SENSITIVITY Transfected Only
    MW (kDa)
    Source/Isotype Rabbit IgG
    Application Key:
    • F-Flow Cytometry 
    Species Cross-Reactivity Key:
    • All-All Species Expected 

    Product Information

    Product Description

    This Cell Signaling Technology® F(ab’)2 fragment lacks an Fc domain, and will not exhibit reactivity with human Fc receptors. This eliminates the need for Fc blocking and reduces false positives in assays containing human monocytes or other cells with high expression of Fc receptors.

    The F(ab')2 fragment is generated by enzymatic digestion of the full-length IgG clone coupled with chromatography to remove both the Fc fragment and the intact IgG. The F(ab’)2 fragment is conjugated to Alexa Fluor® 647 fluorescent dye under optimal conditions.

    Product Usage Information

    Application Dilution
    Flow Cytometry (Live) 1:50

    Storage

    Supplied in PBS (pH 7.2), less than 0.1% sodium azide, and 2 mg/mL BSA. Store at 4°C. Do not aliquot the antibody. Protect from light. Do not freeze.

    Protocol

    Specificity / Sensitivity

    G4S Linker (E7O2V) F(ab')2 Fragment (Alexa Fluor® 647 Conjugate) recognizes exogenously expressed levels of scFv-based CARs containing a G4S linker. This F(ab')2 fragment contains no Fc domain and will not exhibit cross-reactivity with Fc receptors.

    Species Reactivity:

    All Species Expected

    Source / Purification

    Monoclonal antibody is produced by immunizing animals with a synthetic peptide containing three Gly4Ser repeats.

    Background

    The poly-Glycine-Serine (G4S) linker is a type of flexible, unstructured synthetic peptide linker sequence often leveraged to connect the variable heavy (VH) domain and variable light (VL) domain of single-chain variable fragments (scFvs) and chimeric antigen receptors (CARs) that utilize an extracellular domain scFv for target antigen recognition. The linker itself consists of a core pentapeptide sequence, Gly-Gly-Gly-Gly-Ser, that is repeated and commonly found as either a 15-mer (G4S)3 or 20-mer (G4S)4 within scFv-based CARs and scFv fragments. The linker sequence length plays a role in controlling scFv stability and the noncovalent association between the VH and VL domains (1,2).

    Human Fc receptors exhibit strong cross-reactivity with rabbit IgG, and are expressed at high levels on cells of myeloid lineage (e.g., monocytes and myeloid-derived cell lines). Fluorescent anti-linker F(ab')2 fragment conjugates are ideal for use in flow cytometry assays on cells containing Fc receptors, and eliminate the need for an Fc blocking step prior to antibody incubation.

    Cell Signaling Technology employs strict quality control procedures to ensure that each conjugate provides optimal specificity and fluorescence.
    For Research Use Only. Not For Use In Diagnostic Procedures.
    Cell Signaling Technology is a trademark of Cell Signaling Technology, Inc.
    Alexa Fluor is a registered trademark of Life Technologies Corporation.
    This product is provided under an intellectual property license from Life Technologies Corporation. The transfer of this product is conditioned on the buyer using the purchased product solely in research conducted by the buyer, excluding contract research or any fee for service research, and the buyer must not (1) use this product or its components for (a) diagnostic, therapeutic or prophylactic purposes; (b) testing, analysis or screening services, or information in return for compensation on a per-test basis; or (c) manufacturing or quality assurance or quality control, and/or (2) sell or transfer this product or its components for resale, whether or not resold for use in research. For information on purchasing a license to this product for purposes other than as described above, contact Life Technologies Corporation, 5791 Van Allen Way, Carlsbad, CA 92008 USA or [email protected].
    All other trademarks are the property of their respective owners. Visit our Trademark Information page.