| Code | CSB-AP005241HU |
| Abbreviation | Recombinant Human TNFRSF4 protein, partial (Active) |
| MSDS | |
| Size | $184 |
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OX40 (TNFRSF4/CD134) is a costimulatory immune checkpoint receptor critical to T-cell survival and memory formation, making it a high-priority target in immuno-oncology drug development. This recombinant human OX40 construct covers the extracellular ligand-binding domain (residues 29–216) and is expressed in mammalian cells to preserve native disulfide bonding and glycosylation essential for proper receptor folding. Functional ELISA confirms ligand-binding competence, with an ED50 of 1.44 µg/mL against immobilized OX40L, supporting use in receptor-ligand interaction assays, competitive blocking antibody screening, therapeutic antibody epitope mapping, and affinity characterization by SPR or BLI. The C-terminal 6×His tag facilitates oriented immobilization, while purity exceeding 95% by SDS-PAGE and endotoxin levels below 1.0 EU/µg satisfy the quality thresholds commonly required for sensitive binding assays and immune checkpoint research in cancer biology.
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