Recombinant, human neuregulin 1-β1/heregulin 1-β1 epidermal growth factor-like domain (NRG1-β1/HRG1-β1 EGF Domain), consisting of amino acids 176-246 and expressed in E. coli. All NRG1 isoforms contain an EGF-like domain that is required for binding directly to the ErbB3 or ErbB4 receptor tyrosine kinases.

ED₅₀ = 0.06-0.3 ng/ml as measured in a serum-free proliferation assay using MCF-7 human breast adenocarcinoma cells.

Toxicity: Standard Handling (A)

Lyophilized from 0.2 µm filtered acetonitrile, TFA, BSA.

Following reconstitution refrigerate (4°C) for short-term storage or aliquot and freeze (-20°C) for long-term storage. Stock solutions are stable for up to 1 month at 4°C or for up to 3 months at -20°C.

Reconstitute to 100 µg/ml with sterile PBS containing ≥1% human or bovine serum albumin.

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