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Encompassing Amino Acids: 5-65
Amino Acid Sequence: HEEPCGPSHKSFCLNGGLCYVIPTIPSPFCRCVENYTGARCEEVFLPGSSIQTKSNLFEAF
Background: Neuregulins (NDF, heregulin, GGF ARIA, or SMDF) are EGF- like growth and differentiation factors that signal through tyrosine kinase receptors of the ErbB family. The ErbB2 and ErbB4 receptors cooperate in transmission of neuregulin-1 signals in the heart, whereas ErbB2 and ErbB3 cooperate in neural crest cells.
Biological Activity: The ED50 was determined by the phosphorylation of ErbB2 and ErbB4 receptors in CHO cells, and was found to be <3ng/ml, corresponding to a specific activity of 3x 10^5 Units/mg.
Description: Recombinant human Neuregulin-4 EGF domain is a disulfide-linked monomeric protein consisting of 62 amino acid residue subunits, and migrates as an approximately 7 kDa protein under non-reducing and reducing conditions in SDS-PAGE. Optimized DNA sequence encoding Human Neuregulin-4 EGF domain was expressed in E. coli.
Endotoxin Level: <0.1 ng/µg (1 EU/µg), using the LAL gel clot method.
Format: lyophilized protein
Formulation: Lyophilized from a 0.2 µm filtered 20 mM phosphate buffer, pH 6.0.
Genbank: Q8WWG1
Purity: ≥96% by SDS-PAGE and HPLC
Reconstitution: Reconstitute at 0.1-1.0 mg/ml in distilled water. This solution can then be diluted into other buffers. To maximize product collection from vial surface, vortex briefly and then spin down to recollect the liquid.
Storage Stability: The lyophilized protein is stable for at least 2 years from date of receipt when stored at -20°C. Upon reconstitution, store in working aliquots at +4°C for up to one month, or at -20°C for up to six months, in the presence of a carrier protein. Avoid repeated freeze/thaw cycles.
Uniprot: Q8WWG1
Warnings: Avoid freeze/thaw cycles.
Biosafety Level: Not applicable (BSL-1)