Summary: Product Overview: Expressed as a 860 amino acid protein consisting of Ser20-Thr643 region of HER3 and a C-terminal Fc Fusion from human IgG1, which exists as a dimmer under non-reducing condition. Source: Human cells Species: Human Tag: Fc Form: Supplied at 0.5 mg/ml in sterile PBS pH7.4 (carrier and preservative free). The purified recombinant protein was labeled with Biotin (3-5 Biotin per molecule).