Thrombopoietin is the primary regulator of megakaryopoiesis and platelet production, making it indispensable for studying hematopoietic stem cell biology and myeloproliferative disease mechanisms. This recombinant human THPO covers the full-length mature protein (aa 22–353), expressed in mammalian cells to preserve native glycosylation critical for proper receptor binding and in vivo-relevant signaling through c-Mpl. An ED50 of 0.55 ng/mL in a MO7e megakaryocytic cell proliferation assay confirms high receptor-binding potency, supporting use in cell proliferation and survival assays, megakaryocyte differentiation studies, receptor-ligand binding and competition experiments via ELISA or SPR, and in vivo tumor biology models. Purity exceeding 95% by SDS-PAGE combined with endotoxin levels below 1.0 EU/μg satisfies the criteria typical for sensitive cell-based assays and provides a suitable basis for use as an ELISA standard in antibody characterization workflows.
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