| Code | CSB-AP001951HU |
| Abbreviation | Recombinant Human TNFRSF9 protein, partial (Active) |
| MSDS | |
| Size | $142 |
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TNFRSF9 (4-1BB/CD137) is a costimulatory immune checkpoint receptor whose ligand interactions are central to T-cell activation and anti-tumor immunity, making it a high-priority target in immuno-oncology drug development. This tag-free recombinant human TNFRSF9 encompasses the extracellular ligand-binding domain (aa 19–184) and demonstrates robust biological activity, with approximately 90% inhibition of IL-8 production in human PBMCs at 1 µg alongside 4-1BB Ligand—functional evidence that supports use in competitive inhibition assays, blocking antibody screening, and therapeutic antibody epitope mapping. The E. coli-expressed protein achieves >97% purity by SDS-PAGE and endotoxin levels below 1.0 EU/µg, satisfying the quality thresholds commonly required for cell-based functional assays and ligand-receptor interaction studies via ELISA, SPR, or BLI. Researchers investigating 4-1BB agonist antibodies or biologic inhibitors can employ this protein as a positive control in binding assays or for affinity characterization in drug discovery workflows.
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