Recombinant Human Heregulin-β1 (Animal-Free)

Product Details

Source

Human Heregulin-β1, amino acids (Ser177-Glu241) (Accession# NM_013956), was expressed in E. coli.

Molecular Mass

The 65 amino acid recombinant protein has a predicted molecular mass of approximately 7.5 kD. The predicted N-terminal acid is Ser.

Purity

>98%, as determined by Coomassie stained SDS-PAGE.

Formulation

Lyophilized, carrier-free.

Endotoxin Level

Less than 0.1 ng per µg of protein.

Storage & Handling

Unopened vial can be stored at -20°C or -70°C. For maximum results, quick spin vial prior to opening. Reconstitute in water to a concentration of 0.1-1.0 mg/ml. Do not vortex. It is recommended to further dilute in a buffer, such as 5% Trehalose, and store in working aliquots at -20°C to -80°C. Avoid repeated freeze/thaw cycles.

Activity

ED₅₀ ≤ 0.5 ng/ml, corresponding to a specific activity of ≥ 2.0 x 10⁶ units/mg, as measured by its ability to stimulate proliferation of human MCF7 cells in a dose dependent manner.

Application

Bioassay

Application Notes

This product is reactive with human, rat, and mouse.

Product Citations

1. Hader M, et al. 2020. Cancers (Basel). :12. PubMed

Antigen Details

Structure

Growth factor

Distribution

Heregulin-β1 is a secreted protein and is expressed majorly in neuronal cells.

Function

Heregulin-β1 is the ligand for ERBB3 and ERBB4 tyrosine kinase receptors, modulating cell growth and differentiation. Heregulin-β1 has been shown to promote invasiveness and metastasis of breast tumor cells.

Interaction

Heregulin-β1 targets a variety of cell types, including epithelial, glial, neuronal, and skeletal muscle cells.

Ligand/Receptor

Heregulin-β1 interacts with ERBB3 and ERBB4.

Bioactivity

Human Heregulin-β1 is able to induce proliferation of MCF-7 cells.

Biology Area

Angiogenesis, Cell Biology, Cell Motility/Cytoskeleton/Structure, Neuroscience, Synaptic Biology

Molecular Family

Growth Factors, Cytokines/Chemokines

Antigen References

1. Kim S, et al. 2012. Exp. Mol. Med. 44:473.
2. Hutcheson IR, et al. 2011. Breast Cancer Res. 13:R29.
3. Pan MH, et al. 2011. Evid. Based Complement Alternat. Med. 2011:562187.
4. Hernandez L, et al. 2009. Cancer Res. 69:3221.
5. Hutcheson IR, et al. 2007. Breast Cancer Res. 9:R50.
6. Thottassery JV, et al. 2004. Cancer Res. 64:4637.

Gene ID

3084 View all products for this Gene ID

UniProt

View information about Heregulin-beta1 on UniProt.org

Documentation

• Technical Data Sheet (pdf)
• Certificate of Analysis
• Safety Data Sheet

Reviews

Related Pages & Pathways

Related FAQs

Why choose BioLegend recombinant proteins?

     • Each lot of product is quality-tested for bioactivity as indicated on the data sheet.
     • Greater than 95% Purity or higher, tested on every lot of product.
     • 100% Satisfaction Guarantee for quality performance, stability, and consistency.
     • Ready-to-use liquid format saves time and reduces challenges associated with reconstitution.
     • Bulk and customization available. Contact us.
     • Learn more about our Recombinant Proteins.

How does the activity of your recombinant proteins compare to competitors?

We quality control each and every lot of recombinant protein. Not only do we check its bioactivity, but we also compare it against other commercially available recombinant proteins. We make sure each recombinant protein’s activity is at least as good as or better than the competition’s. In order to provide you with the best possible product, we ensure that our testing process is rigorous and thorough. If you’re curious and eager to make the switch to BioLegend recombinants, contact your sales representative today!

What is the specific activity or ED50 of my recombinant protein?

The specific activity range of the protein is indicated on the product datasheets. Because the exact activity values on a per unit basis can largely fluctuate depending on a number of factors, including the nature of the assay, cell density, age of cells/passage number, culture media used, and end user technique, the specific activity is best defined as a range and we guarantee the specific activity of all our lots will be within the range indicated on the datasheet. Please note this only applies to recombinants labeled for use in bioassays. ELISA standard recombinant proteins are not recommended for bioassay usage as they are not tested for these applications.

Have your recombinants been tested for stability?

Our testing shows that the recombinant proteins are able to withstand room temperature for a week without losing activity. In addition the recombinant proteins were also found to withstand four cycles of freeze and thaw without losing activity.

Does specific activity of a recombinant protein vary between lots?

Specific activity will vary for each lot and for the type of experiment that is done to validate it, but all passed lots will have activity within the established ED50 range for the product and we guarantee that our products will have lot-to-lot consistency. Please conduct an experiment-specific validation to find the optimal ED50 for your system.

How do you convert activity as an ED50 in ng/ml to a specific activity in Units/mg?

Use formula Specific activity (Units/mg) = 10^6/ ED50 (ng/mL)

Certificate of Analysis