Monoclonal Anti-G4S linker Antibody, Rabbit IgG (016), CF (carrier free), premium grade

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Cat. No. / Size
Price
Qty
G4S-CY25P1-500ug
$2811.00
G4S-CY25P1-5mg (500ug X 10)
$16864.00
ETA of in-stock products:2 business days

Product Details

  • Features and Advantages

    1. Seamless Transition from Preclinical to Clinical: Same cell clone, process, and QC as GMP products.
    2. Enhanced Production Standards: AOF raw materials, pharma-grade excipients, Grade B+A (ISO 5) environment.
    3. Comprehensive Quality Control: Additional strict testing for process impurities, sterility, and mycoplasma.
    4. Cost-Effective Solution: GMP-comparable quality at an economical price for early development.
    5. Risk Mitigation: Enhanced safety through rigorous impurity control and comprehensive testing.
  • Source

    Monoclonal Anti-G4S linker Antibody, Rabbit IgG (016), premium grade is a rabbit monoclonal antibody recombinantly expressed from human 293 cells (HEK293), it shows superior performance in flow cytometry assays with higher affinity and better specificity.

    It is produced under our rigorous quality control system that incorporates a comprehensive set of tests including sterility and endotoxin tests. Product performance is carefully validated and tested for compatibility for cell culture use or any other applications in the early preclinical stage. When ready to transition into later clinical phases, we also offer a custom GMP protein service that tailors to your needs. We will work with you to customize and develop a GMP-grade product in accordance with your requests that also meets the requirements for raw and ancillary materials use in cell manufacturing of cell-based therapies.

  • Isotype

    Rabbit IgG, Kappa

  • Specificity

    It can specifically recognize proteins or ScFv containing (G3S)n or (G4S)n linkers, where n = 2, 3, 4... That is, it can recognize linkers with a minimum length of 2 repeats for both (G3S)n and (G4S)n.

  • Endotoxin

    Less than 0.01 EU per μg by the LAL method / rFC method.

  • Protein A

    <5 ppm of protein tested by ELISA.

  • Host Cell Protein

    <0.5 ng/μg of protein tested by ELISA.

  • Host Cell DNA

    <0.02 ng/μg of protein tested by qPCR.

  • Sterility

    Negative

  • Mycoplasma

    Negative

  • Formulation

    Supplied as 0.2 μm filtered solution in PBS, pH7.4 with trehalose as protectant.

    Contact us for customized product form or formulation.

  • Shipping

    This product is supplied and shipped with dry ice, please inquire the shipping cost.

  • Storage

    For long term storage, the product should be stored at liquid state at -20℃ or below.

    Please avoid repeated freeze-thaw cycles.

    This product is stable after storage at:

    1. -20℃ or below for 24 months under sterile conditions;
    2. 2-8℃ for 12 months under sterile conditions.
  • ACRO Quality Management System

    1. QMS(ISO, GMP)
    2. Quality Advantages
    3. Quality Control Process
  • Quality Description

    ACRO's Research-grade products are suitable for a wide range of cell culture applications, particularly for research use in academic institutions. These products are sterilized by filtration, followed by lyophilization where applicable. Typical specifications include endotoxin levels of <0.01 EU/μg and purities >95%. Biological activity is calibrated against WHO/NIBSC standards when available.
    ACRO's Premium-grade (Pre-GMP) products are characterized by their high quality and enhanced safety profiles, making them ideal for early-stage discovery and manufacturing processes in cell therapy companies. A key advantage is their seamless transition to corresponding GMP-grade versions. Biological activity is calibrated against WHO/NIBSC standards when available. Typical specifications include endotoxin levels of <0.01 EU/μg and purities >95%. In addition, rigorous testing is conducted to ensure the absence of mycoplasma, HCD, and HCP, thereby guaranteeing product safety.

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Performance Data

  • Bioactivity-FACS

     G4S linker FACS

    Flow cytometric analysis of Anti-MSLN CAR-293 cells staining with Monoclonal Anti-G4S Linker Antibody, Rabbit IgG (016), premium grade (Cat. No. G4S-CY25P1) at 3 µg/mL (0.3 µg corresponds to labeling of 1e6 cells in a final volume of 100 µL) and secondary antibody. PE signal was used to evaluate the binding activity (QC tested).

    Protocol
  •  G4S linker FACS

    Non-specificity of Monoclonal Anti-G4S Linker Antibody, Rabbit IgG (016), premium grade (Cat. No. G4S-CY25P1) binding to CD3+ cells present in human PBMC. 5e5 of human PBMCs were simultaneously stained with FITC-labeled anti-CD3 antibody and Monoclonal Anti-G4S Linker Antibody (016) (0.3 µg corresponds to labeling of 5e5 cells in a final volume of 100 µL) and washed and then analyzed with FACS. Both FITC and PE positive signals was used to evaluate the non-specific binding activity to human CD3+ cells (QC tested).

    Protocol

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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 or20-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.

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[Switzerland]: ACRObiosystems AG, c/o Zug Dammstrasse Centre AG, Dammstrasse 19, 6300 Zug Switzerland