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Data and Publications
(A) The biological activity of Human Recombinant Heregulin-beta 1 was tested by its ability to promote the proliferation of MCF-7 cells. Cell proliferation was measured using a fluorometric assay method. The EC50 is defined as the effective concentration of the growth factor at which cell proliferation is at 50% of maximum. The EC50 in the example above is less than 0.1 ng/mL. (B) 2 μg of Human Recombinant Heregulin-beta 1 was resolved with SDS-PAGE under reducing (+) and non-reducing (-) conditions and visualized by Coomassie Blue staining. Human Recombinant Heregulin-beta 1 has a predicted molecular mass of 7.5 kDa.