| Code | CSB-AP002361HU |
| Abbreviation | Recombinant Human TNFRSF1A protein, partial (Active) |
| MSDS | |
| Size | $142 |
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TNFRSF1A (p55/TNF-RI) serves as the primary high-affinity receptor for TNF-alpha, making its soluble extracellular domain an essential tool for dissecting TNF signaling in inflammation and tumor biology. This tag-free recombinant construct spans residues 22–211, encompassing the complete extracellular ligand-binding domain, and demonstrates potent neutralizing activity with an ED50 below 0.05 μg/mL in L-929 cytotoxicity inhibition assays—corresponding to a specific activity exceeding 2 × 10⁴ IU/mg. Such validated TNF-alpha blocking capacity supports use in competitive inhibition assays, blocking antibody screening, therapeutic antibody epitope mapping, and small-molecule inhibitor discovery programs targeting the TNF/TNFR1 axis. Produced in *E. coli* with purity greater than 97% by SDS-PAGE and endotoxin levels below 1.0 EU/μg, this preparation satisfies the quality criteria typical for cell-based neutralization experiments, SPR-based affinity characterization, and ligand-binding ELISAs requiring a reliable positive control.
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