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

  • Premium grade (Pre-GMP) version G4S-BLM25A1 is now available for seamless transition.
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GMP-MG4S25-5mg
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Product Details

  • Product Features and Advantages

    1. Wide-ranging functions: Plays a critical bridging role in biotinylated antibody-based cell separation workflows, enabling highly specific, gentle and efficient isolation of T cells, NK cells and other immune cell subsets, supporting standardized manufacturing of CAR-related pipelines. ACROBiosystems is the only GMP Biotinylated Monoclonal Anti-G4S linker Antibody available supplier.
    2. High Performance: Exhibits superior binding affinity and low non-specific background, ensuring high recovery and viability of target cells during immunomagnetic separation, making it the preferred choice for numerous pharmaceutical enterprises in preclinical and clinical-stage cell therapy development.
    3. Comprehensive Safety Assurance: ECACC-compliant HEK293 host cell origin, comprehensive testing (28 items), dual virus reduction measures and comprehensive viral clearance validation, animal origin-free (AOF) production process, with stringent final product quality control and release specifications to support clinical-grade applications.
    4. Lot-to-Lot Consistency: Achieved through a stable cell line and robust manufacturing process, ensuring reliable, reproducible separation performance from early-stage research through clinical manufacturing.
  • GMP Platform Advantages

    1. Quality Assurance: Global QMS with comprehensive and stringent QC release criteria.
    2. End-to-End GMP Compliance: Full manufacturing and QC under a cGMP system.
    3. Comprehensive Control of Adventitious Agents: Stringent biosafety from cell banks to final release.
    4. Comprehensive Regulatory Support: Includes RSF and DMF to meet global requirements.
    5. Resilient Supply Chain: Intelligent modular facilities ensure a stable global supply.
    6. Professional Support: Extensive manufacturing and application expertise to accelerate development.
  • Source

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

  • Isotype

    Rabbit IgG, Kappa

  • Conjugate

    Biotin

  • 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 10 EU/mg, tested by the rFC method in compliance with USP <86> and Ph. Eur. 2.6.32.

  • 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.

  • Purity

    >95% as determined by SDS-PAGE.

  • Sterility

    Sterility testing was performed using the membrane filtration method in compliance with USP <71> and Ph. Eur. 2.6.1.

  • Mycoplasma

    Negative

  • Formulation

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

    Contact us for customized product form or formulation.

  • Vial Specification

    15R (20 mm neck finish)

  • 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. 2-8℃ for 12 months under sterile conditions;
    2. -20℃ or below for 5 years.
  • ACRO Quality Management System

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

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Performance Data

  • Bioactivity-FACS

     G4S linker FACS

    Flow cytometric analysis of Anti-MSLN CAR-293 cells staining with GMP Biotinylated Monoclonal Anti-G4S linker Antibody, Rabbit IgG (016), CF (carrier free) (Cat. No. GMP-MG4S25) at 3 μg/mL (0.3 μg corresponds to labeling of 1e6 cells in a final volume of 100 µL) and PE-SA. The PE signal was used to evaluate the binding activity (QC tested).

    Protocol
  •  G4S linker FACS

    Non-specificity of GMP Biotinylated Monoclonal Anti-G4S linker Antibody, Rabbit IgG (016), CF (carrier free) (Cat. No. GMP-MG4S25) binding to CD3+ cells present in human PBMC. 5e5 of human PBMCs were simultaneously stained with FITC-labeled anti-CD3 antibody and GMP Biotinylated Monoclonal Anti-G4S linker Antibody, Rabbit IgG (016), CF (carrier free) (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 were 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.

  •  G4S linker APPLICATION DATA

    For each 9 × 10^6 anti-CD19 CAR-T cells, isolation was performed using 0.6 µg of GMP Biotinylated Monoclonal Anti-G4S linker Antibody, Rabbit IgG (016) (Cat. No. GMP-MG4S25), followed by 30 μL/50 μL of either Cellectra Streptavidin nBeads, Research grade (for cells) (Cat. No. MBS-S003) or streptavidin beads from Company M. Both isolated and non-isolated cells were stained with PE-Labeled Monoclonal Anti-FMC63 Antibody, Mouse IgG1 (Cat. No. FM3-HPY53) and subsequently analyzed using FCS Express 7 software. Following dead cell exclusion by 7-AAD staining, the PE‑positive signal in the viable cell population is used to assess specific binding to CAR‑T cells. ACRO's Streptavidin beads offer a clear advantage over Company M in recovery rate (Routinely tested). % Recovery = (Viable sorted Cells × Final Purity) / (Viable Input Cells × Starting Purity) × 100.

  • Bioactivity-Stability

     G4S linker STABILITY

    FACS assay demonstrates that GMP Biotinylated Monoclonal Anti-G4S linker Antibody, Rabbit IgG (016), CF (carrier free) (Cat. No. GMP-MG4S25) is stable at 37°C for 37 days.

  •  G4S linker STABILITY

    FACS assay demonstrates that GMP Biotinylated Monoclonal Anti-G4S linker Antibody, Rabbit IgG (016), CF (carrier free) (Cat. No. GMP-MG4S25) is stable at 4°C for 180 days.

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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.

Important Statement

  • MANUFACTURING SPECIFICATIONS

    ACROBiosystems GMP grade products are produced under a quality management system and in compliance with relevant guidelines: Ph. Eur General Chapter 5.2.12 Raw materials of biological origin for the production of cell-based and gene therapy medicinal products; USP<92>Growth Factors and Cytokines Used in Cell Therapy Manufacturing; USP<1043>Ancillary Materials for Cell, Gene, and Tissue-Engineered Products; ISO/TS 20399-1:2018, Biotechnology - Ancillary Materials Present During the Production of Cellular Therapeutic Products.

    ACROBiosystems Quality Management System Contents:

    1. GMP-certified facility (compliance with FDA cGMP, EMA GMP, ICH, ISO9001/13485/MDSAP, and certified by third-party SGS, UL, and RX360)
    2. Animal origin-free materials, equipments, and facilities
    3. Materials sourced only from approved suppliers
    4. ISO 5 cleanrooms and automatic filling equipment
    5. Professional quality personnel and training programs
    6. Validated analytical testing methods in accordance with the ICH guidelines
    7. Safety Testing (Sterility, Mycoplasma, etc): compliant with USP, EP, etc
    8. In-depth stability studies
    9. Fully batch production and control records
    10. Equipment maintenance and calibration

    Request For Regulatory Support Files (RSF)

    ACROBiosystems provide rigorous quality control tests (fully validated equipment, processes and test methods) on our GMP grade products to ensure that they meet stringent standards in terms of purity, safety, activity and inter-batch stability, and each bulk QC lot mainly contains the following specific information:

    1. SDS-PAGE
    2. Protein content
    3. Endotoxin level
    4. Residual Host Cell DNA content
    5. Residual Host Cell Protein content
    6. Biological activity analysis
    7. Microbial testing
    8. Mycoplasma testing
    9. In vitro virus assay
    10. Batch-to-batch consistency

  • ACROBIOSYSTEMS - LEGAL NOTICES FOR GMP GRADE PRODUCTS

    1. PRODUCT USE RESTRICTIONS & PROHIBITIONS

    • 1.1 ACROBiosystems ("ACRO") GMP grade products ("Products") are designed for research, manufacturing use or ex vivo use.
    • 1.2 Products are NOT intended for diagnostic purposes or for direct or indirect administration into humans.
    • 1.3 Purchaser shall not market, distribute, or resell Products obtained from ACRO without ACRO's prior written consent.

    2. REVERSE ENGINEERING PROHIBITED & CONFIDENTIALITY

    • 2.1 Purchaser shall not reverse-engineer, decompile, disassemble, sequence, analyze via bioinformatics, or otherwise attempt to discover the structure, sequence, composition, construction, manufacturing process, or any trade secret embodied in the Products. Purchaser shall not permit any third party to undertake such activities.
    • 2.2 All specifications, data, and know-how related to the Products provided by ACRO are ACRO's confidential information and shall be protected accordingly.

    3. LIMITED WARRANTY & DISCLAIMERS

    • 3.1 ACRO warrants solely that Products will conform to their published specifications when used under normal, specified laboratory/manufacturing conditions and within their labeled expiration date. THIS IS THE ONLY WARRANTY PROVIDED.
    • 3.2 Purchaser assumes ALL risk and responsibility for:
      (a) Determining the suitability of Products for Purchaser's intended application(s).
      (b) Obtaining any necessary regulatory approvals or intellectual property licenses for Purchaser's use.
      (c) Compliance with all applicable laws, regulations (including but not limited to cGMP/GLP where claimed), and industry standards.
      (d) Conducting all necessary quality control, safety, efficacy, and validation testing of Products within Purchaser's process or final product.
      (e) Proper storage, handling, and use of Products according to ACRO's instructions.
    • 3.3 ACRO EXPRESSLY DISCLAIMS ALL OTHER WARRANTIES, WHETHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, INCLUDING BUT NOT LIMITED TO: (A) WARRANTIES OF MERCHANTABILITY; (B) WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE; (C) WARRANTIES OF NON-INFRINGEMENT; AND (D) WARRANTIES ARISING FROM COURSE OF DEALING OR USAGE OF TRADE.

    4. LIMITATION OF LIABILITY

    • IN NO EVENT SHALL ACRO, ITS AFFILIATES, OR SUPPLIERS BE LIABLE FOR ANY OF THE FOLLOWING, HOWSOEVER ARISING (WHETHER IN CONTRACT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY, STATUTE, OR OTHERWISE):
      (a) LOST PROFITS, LOST REVENUE, LOST SAVINGS, LOSS OF USE, LOSS OF DATA, BUSINESS INTERRUPTION, OR ANY OTHER INDIRECT, INCIDENTAL, SPECIAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES.
      (b) ANY DIRECT DAMAGES, COSTS, OR EXPENSES EXCEEDING THE AMOUNT PAID BY PURCHASER FOR THE SPECIFIC PRODUCT(S) GIVING RISE TO THE CLAIM.
      (c) DAMAGES ARISING FROM: (i) MISUSE, ABUSE, OR UNAUTHORIZED MODIFICATION OF PRODUCTS; (ii) USE BEYOND THE EXPIRATION DATE; (iii) IMPROPER STORAGE OR HANDLING; (iv) ACCIDENTAL DAMAGE; (v) FAILURE TO CONDUCT ADEQUATE VALIDATION OR TESTING BY PURCHASER; (vi) INFRINGEMENT CLAIMS RELATED TO PURCHASER'S USE; OR (vii) THE COST OF PROCURING SUBSTITUTE GOODS OR SERVICES.
      (d) ANY PERSONAL INJURY, DEATH, OR DAMAGE TO TANGIBLE PROPERTY TO THE EXTENT PERMITTED BY LAW.

    5. END USER ACKNOWLEDGEMENT & COMPLIANCE

    • 5.1 By accepting, opening, or using the Products, the End User (Purchaser or its downstream recipient) agrees to be irrevocably bound by all terms herein.
    • 5.2 End User explicitly acknowledges the Products are NOT FOR HUMAN ADMINISTRATION and agrees not to use them in any in vivo human application, directly or indirectly.
    • 5.3 End Users unwilling to accept these terms must immediately: (a) cease all use; (b) notify ACRO or their supplier; and (c) return the unopened, unused Products.
    • 5.4 ACRO reserves the right to audit End User's compliance with these restrictions upon reasonable notice.

    ACRO has the right, at its sole discretion, to modify, add or remove any terms herein without notice to Purchaser and/or End User. Any changes to these terms are effective immediately following the updating of such changes on ACRO’s website or published specifications or product-related documents.

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  • Performance Data
  • Customer Reviews
  • Background
  • Important Statement
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