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R&D Systems CHO-derived Recombinant Human TGF-beta 1 Protein (240-B) Quality control testing to verify active proteins with lot specific assays by in-house scientists
Equivalent bioactivity of CHO-derived (Catalog # 240-B) and HEK293-derived (7754-BH) Recombinant Human TGF‑ beta 1 as measured by its ability to inhibit the IL-4-dependent proliferation of HT‑2 mouse T cell. (orange, green, respectively).

