| Code | CSB-AP004401HU |
| Abbreviation | Recombinant Human IL4 protein (Active) |
| MSDS | |
| Size | $226 |
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IL-4 drives Th2 polarization, B-cell class switching, and alternative macrophage activation, making it indispensable for dissecting JAK1/STAT6 signaling and immune cell differentiation programs. This tag-free recombinant human IL-4 encompasses the full mature sequence (aa 25–153) and demonstrates potent bioactivity with an ED50 of 10–70 pg/mL in TF-1 cell proliferation assays, confirming reliable performance in functional studies including primary T-cell and B-cell activation, Th2 differentiation, and macrophage polarization experiments. Endotoxin levels below 1.0 EU/μg eliminate LPS-driven artifacts that confound cytokine-dependent readouts in sensitive immune cell cultures and in vivo inflammation models. The combination of greater than 95% purity by SDS-PAGE and stringent endotoxin control supports use as a reference standard in cytokine detection assays, a positive control for STAT6 phosphorylation studies, and a functional reagent for antibody development and validation workflows.
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