- Catalog number
- ICH1184-25mg
- Size / count
- 25 mg
- Dry ice
- No
- Hazardous
- No
- Discontinued
- No
- Background
- 4-1BBL (CD137L) and 4-1BB (CD137) are a receptor ligand pair belonging to the tumor necrosis factor (TNF) receptor/TNF superfamily. 4-1BBL is a type II transmembrane protein expressed by activated B cells, macrophages, and dendritic cells. Members of the TNF-TNF receptor superfamily play critical roles in regulating cellular activation, differentiation, and apoptosis and the 4-1BBL-4-1BB interaction is important in cellular immune responses. 4-1BBL-4-1BB interaction provides a co-stimulatory signal to T cells, resulting in increased proliferation and cytokine production.
A TKS-1-producing hybridoma was generated by immunizing a SD rat with 4-1BBL-transfected NRK cells (rat IgG2a,κ). Splenocytes were fused with P3U1 cells and hypoxanthine–aminopterin–thymidine selection was performed. The monoclonal antibody was identified by its strong reactivity with 4-1BBL-transfected L5178Y cells, cloned by limiting diffusion, purified from ascites, and found to bind to 4-1BBL/NRK and 4-1BBL/P815 cells.
Pre-incubation with TKS-1 blocks 4-1BB–Ig binding to 4-1BBL/L5178Y cells, indicating TKS-1 is specific to mouse 4-1BBL and can interrupt the interaction between 4-1BBL and 4-1BB. Additionally, TKS-1 can block anti-CD3-stimulated T cell proliferation co-stimulated by 4-1BBL /P815 cells. The monoclonal antibodies 19H3 and TKS-1 bind to different sites on murine 4-1BBL, with TKS-1 binding to a site that overlaps with the receptor binding site. Additionally, TKS-1 and 4-1BB bind to a similar site, making TKS-1 especially useful for blocking studies.
- CAS Number
- 9007-83-4
- Specifications
- TKS-1 activity is directed against 4-1BBL (CD137L)
- Product Name Alternative
- CD137L, TNFSF9, 4-1BB Ligand, TKS-1
- Host
- Rat
- Species Reactivity
- Mouse
- Target
- 4-1BBL
- Isotype
- IgG2a Kappa
- Clone
- TKS-1
- Applications
- Blocking, Functional Assays, Western Blot
- Purification Method
- This monoclonal antibody was purified using Protein G
- Concentration
- ≥ 5.0 mg/mL
- Endotoxin
- <1.0 EU/mg as determined by the LAL method
- Purity
- ≥95% monomer by analytical SEC, >95% by SDS Page
- Buffer
- ICH3001-100mL
ICH3002-100mL
ICH3003-100mL
- Shipping Conditions
- Blue ice
- Storage Conditions
- This antibody is stable for at least one week when stored sterile at 2-8°C. For long term storage aseptically aliquot in working volumes without diluting and store at –80°C. Avoid Repeated Freeze Thaw Cycles.
- Formulation
- This monoclonal antibody is aseptically packaged and formulated in 0.01 M phosphate buffered saline (150 mM NaCl) PBS pH 7.2 - 7.4 with no carrier protein, potassium, calcium or preservatives added.
- Antigen Distribution
- 4-1BBL is expressed by activated B cells, macrophages, and dendritic cells
- Aggregation
- Aggregation level ≤ 5%
- Applications Notes
- Each investigator should determine their own optimal working dilution for specific applications.
