| Code | CSB-AP004271HU |
| Abbreviation | Recombinant Human IL4R protein, partial (Active) |
| MSDS | |
| Size | $204 |
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IL4R-alpha serves as the primary ligand-binding chain for both IL-4 and IL-13 signaling complexes, making its extracellular domain a critical tool for dissecting type I and type II receptor biology. This recombinant construct spans residues 26–232 of the extracellular domain, expressed in mammalian cells to preserve native glycosylation and disulfide-mediated folding essential for high-affinity ligand engagement. Functional validation confirms an ED50 of 5–20 ng/mL in inhibiting IL-4-dependent TF-1 cell proliferation, directly supporting use in competitive inhibition assays, blocking antibody screening, and therapeutic antibody epitope mapping. With purity exceeding 95% by SDS-PAGE and endotoxin levels below 1.0 EU/μg, this protein satisfies the quality criteria typical for SPR/BLI affinity characterization, receptor-ligand interaction ELISAs, and small-molecule or biologic inhibitor screening campaigns targeting the IL-4/IL-13 signaling axis.
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