| Code | CSB-AP004481HU |
| Abbreviation | Recombinant Human IL4 protein (Active) |
| MSDS | |
| Size | $184 |
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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. This tag-free recombinant human IL-4, encompassing the full mature sequence (aa 25–153) produced in mammalian cells, demonstrates exceptional potency with an ED50 of 0.01–0.05 ng/mL in TF-1 proliferation assays, confirming reliable dose-dependent activity at sub-nanogram concentrations. Endotoxin levels below 1.0 EU/μg eliminate LPS-driven artifacts, which supports use in sensitive primary cell cultures such as naïve T-cell differentiation, B-cell activation, and monocyte-to-macrophage polarization studies. Purity exceeding 95% by SDS-PAGE, combined with this stringent endotoxin control, provides a suitable basis for applications including STAT6 phosphorylation kinetics, in vivo Th2-driven inflammation models, cytokine detection assay standardization, and antibody validation by ELISA.
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