Interleukin-10 is a pleiotropic cytokine central to immune suppression and resolution of inflammation, making precise functional activity essential for meaningful in vitro and in vivo work. This tag-free recombinant mouse IL-10, encompassing the full mature sequence (aa 19–178), demonstrates an ED50 of 6 ng/ml in FDC-P1 bone marrow cell proliferation assays, confirming robust signaling potency suitable for JAK1/STAT3 pathway dissection, macrophage deactivation studies, and T-cell differentiation experiments. Endotoxin levels below 1.0 EU/μg eliminate LPS-driven artifacts that would otherwise confound cytokine-specific readouts in primary immune cell cultures and in vivo mouse models of colitis, sepsis, or tumor immunology. Purity exceeding 95% by SDS-PAGE, combined with this stringent endotoxin control, supports use as a reference standard in ELISA-based cytokine detection and as a functional control for anti-IL-10 antibody validation.
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