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

  • GMP version GMP-MG4S25 is now available for seamless transition.
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Product Number/Spec
Price
Menge
Premium grade liquid
G4S-BLM25A1-500ug
$3654.00
G4S-BLM25A1-5mg
$17539.00
GMP liquid
GMP-MG4S25-5mg
Anfrage
ETA of in-stock products:2 business days
Gesamtanzahl Product Amount$ 0

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

    Biotinylated Monoclonal Anti-G4S linker Antibody, Rabbit IgG (016), CF (carrier free), premium grade is a rabbit monoclonal antibody (labelled by chemically labeling technology) recombinantly expressed from human 293 cells (HEK293), it shows superior performance in various applications such as ELISA assays and 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.
    GMP-MG4S25 is the GMP version of this G4S-BLM25A1. These two proteins display indistinguishable performance profiles, thereby ensuring a seamless transition for end users from early preclinical stage to later clinical phases.

  • Isotype

    Rabbit IgG, Kappa

  • Conjugate

    Biotin

  • Application

    1. Flow Cytometry (Evaluation of cell surface expressed CARs of varying specificity containing a G4S linker within the scFv of the extracellular domain).

    2. Immunoassay of bispecific antibody.

    3. CAR T cell enrichment and sorting.

  • 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 -70°C.

    Please avoid repeated freeze-thaw cycles.

    This product is stable after storage at:

    1. 2-8°C for 12 months under sterile conditions;
    2. -70°C for 24 months under sterile condition.
  • 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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Data Display

  • Bioactivity-FACS

     G4S linker FACS

    Flow cytometric analysis of Anti-MSLN CAR-293 cells staining with Biotinylated Monoclonal Anti-G4S Linker Antibody, Rabbit IgG (Cat. No. G4S-BLM25A1) at 3 μg/mL (0.3 μg corresponds to labeling of 1e6 cells in a final volume of 100 µL) and PE-SA. PE signal was used to evaluate the binding activity (QC tested).

    Protocol
  •  G4S linker FACS

    Non-specificity of Biotinylated Monoclonal Anti-G4S Linker Antibody, Rabbit IgG (016), premium grade (Cat. No. G4S-BLM25A1) binding to CD3+ cells present in human PBMC. 5e5 of human PBMCs were simultaneously stained with FITC-labeled anti-CD3 antibody and Biotinylated 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
  • Application Data

     G4S linker APPLICATION DATA

    1.5E7 Anti-CD19 CAR-T cells were stained with GMP Biotinylated Monoclonal Anti-G4S linker Antibody, Rabbit IgG (016), CF (carrier free) (Cat. No. GMP-MG4S25) or Biotinylated Monoclonal Anti-G4S linker Antibody, Rabbit IgG (016), CF (carrier free), premium grade (Cat. No. G4S-BLM25A1) (1 µg per 10^6 cells) and subsequently isolated using Anti-Biotin MicroBeads. Both pre- and post-separation cells were then stained with FITC-Labeled Monoclonal Anti-FMC63 Antibody, Mouse IgG1 (Y45) (Cat. No. FM3-FY45) and analyzed by flow cytometry using FCS Express 7 software. Following the separation process, the percentage of Anti-CD19 CAR-T cells was enriched from an initial 73.12% to a final purity of 98%, indicating a highly successful isolation and a good batch-to-batch consistency between Cat. No. GMP-MG4S25 and Cat. No. G4S-BLM25A1.

User Reviews
Publish Comment

Background Introduction

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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