Product Details
Features and Advantages
- Seamless Transition from Preclinical to Clinical: Same cell clone, process, and QC as GMP products.
- Enhanced Production Standards: AOF raw materials, pharma-grade excipients, Grade B+A (ISO 5) environment.
- Comprehensive Quality Control: Additional strict testing for process impurities, sterility, and mycoplasma.
- Cost-Effective Solution: GMP-comparable quality at an economical price for early development.
- 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:
- 2-8°C for 12 months under sterile conditions;
- -70°C for 24 months under sterile condition.
ACRO Quality Management System
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

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
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

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.
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