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Pack Size:100μg/vial
Validated Species:Human
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Product Name Anti-ERBB3/Her3 Antibody
SKU/Catalog Number PA1880
Description Rabbit IgG polyclonal antibody for Receptor tyrosine-protein kinase erbB-3(ERBB3) detection. Tested with WB in Human.
Cite This Product Anti-ERBB3/Her3 Antibody (Boster Biological Technology, Pleasanton CA, USA, Catalog # PA1880)
Replacement Item This antibody may replace the following items: sc-135654|sc-285|sc-285-G|sc-292557|sc-415|sc-53279|sc-71067|sc-7390|sc-81454|sc-81455 from Santa Cruz Biotechnology.
Host Rabbit
Isotype N/A
Validated Species Human
Predicted Species Bovine

*This antibody is predicted to react with the above species based on antigen sequence similarities. Our Boster Guarantee covers the use of this product with the above species.

Application WB

*Our Boster Guarantee covers the use of this product in the above tested applications.

**For positive and negative control design, consult "Tissue specificity" under Protein Target Info.

Recommended Detection Systems Boster recommends Enhanced Chemiluminescent Kit with anti-Rabbit IgG (EK1002) for Western blot.
*Blocking peptide can be purchased at $50. Contact us for more information
**Boster also offers various secondary antibodies for Immunoflourescecne and IHC. Take advantage of the buy 1 primary antibody get 1 secondary antibody for free promotion for the entire year 2017!
Immunogen A synthetic peptide corresponding to a sequence at the N-terminus of human ErbB 3(162-181aa DWRDIVRDRDAEIVVKDNGR).
Cross Reactivity No cross reactivity with other proteins
Pack Size 100μg/vial


Clonality Polyclonal
Form Lyophilized
Contents Each vial contains 5mg BSA, 0.9mg NaCl, 0.2mg Na2HPO4, 0.05mg Thimerosal, 0.05mg NaN3.
*carrier free antibody available upon request.
Concentration Add 0.2ml of distilled water will yield a concentration of 500ug/ml.
Storage At -20°C for one year. After reconstitution, at 4°C for one month. It can also be aliquotted and stored frozen at -20°C for a longer time.Avoid repeated freezing and thawing.
Purification Immunogen affinity purified.
Isotype N/A

Protein Target Info (Source:

You can check the tissue specificity below for information on selecting positive and negative control.

Gene Name ERBB3
Protein Name Receptor tyrosine-protein kinase erbB-3
Molecular Weight 148098 MW
Protein Function Binds and is activated by neuregulins and NTAK. May also be activated by CSPG5. .
Tissue Specificity Epithelial tissues and brain.
Sequence Similarities Belongs to the protein kinase superfamily. Tyr protein kinase family. EGF receptor subfamily.
Subcellular Localization Isoform 1: Cell membrane; Single-pass type I membrane protein.
Uniprot ID P21860
Alternative Names Receptor tyrosine-protein kinase erbB-3;;Proto-oncogene-like protein c-ErbB-3;Tyrosine kinase-type cell surface receptor HER3;ERBB3;HER3;
Research Areas |cell biology|apoptosis|intracellular|kinases| signal transduction|protein phosphorylation|tyrosine kinases|receptor tyrosine kinases|growth factors/hormones|egf| developmental biology|organogenesis|angiogenesis and vasculogenesis|nervous system development| kits/ lysates/ other|elisa kits|growth factors and hormones elisa kits|tumor biomarkers elisa kits|
*if product is indicated to react with multiple species, protein info is based on the human gene.

Background for Receptor tyrosine-protein kinase erbB-3

ERBB3(V-erb-b2 avian erythroblastic leukemia viral oncogene homolog 3) also known as ONCOGENE ERBB3 or HER3, is an enzyme that in humans is encoded by the ERBB3 gene. This gene encodes a member of the epidermal growth factor receptor(EGFR) family of receptor tyrosine kinases. This membrane-bound protein has a neuregulin binding domain but not an active kinase domain. By in situ hybridization, Kraus et al.(1989) mapped the ERBB3 gene to chromosome 12q13. Carraway et al.(1994) demonstrated that ERBB3 is a receptor for heregulin and is capable of mediating HGL-stimulated tyrosine phosphorylation of itself. Most notably, EGFR and ErbB2 became markedly more promiscuous as the threshold was lowered, whereas ErbB3did not. Engelman et al.(2007) found that amplification of MET caused gefitinib resistance by driving ERBB3-dependent activation of phosphoinositide 3-kinase, a pathway though to be specific to EGFR/ERBB family receptors.

Anti-ERBB3/Her3 Antibody Images

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Anti-ERBB3/Her3 Antibody
Anti-ErbB 3 antibody, PA1880, Western blotting
Recombinant Protein Detection Source: E.coli derived -recombinant Human ERBB3, 45.0KD (162aa tag+ M1-A245)
Lane 1: Recombinant Human ERBB3 Protein 5ng
Lane 2: Recombinant Human ERBB3 Protein 2.5ng
Lane 3: Recombinant Human ERBB3 Protein 1.25ng
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Customer Q&As

Q: Do you offer BSA-free antibodies? Keyword: Bovine serum albumin, carrier protein, conjugation
A: Yes, please contact us at for more information about BSA-free antibodies and availability. The new BSA-free formula uses trehalose as a replacement to BSA. We have tested many alternative chemicals and found that trehalose protects the antibodies the best.
Q: Is your western blot protocol provided from the website applicable for all your antibodies? Keyword: applications, WB
A: The protocol is applicable for all our antibodies in WB, the NC Membrane(0.45μm or 0.22μm) and transfer time(70 mins or 50 mins) depends on the protein molecular weight, details can be found in included protocol.
Q: Can I conjugate markers to this antibody? Can I link custom conjugates to this antibody? Keyword: conjugation
A: The antibody is stored with BSA and cannot be conjugated with markers. Carrier free antibodies are available upon request. Please contact
Q: What should I use for negative control?
A: Please contact us for negative control suggestions. You can also check expression databases such as genecards, uniprot etc. Due to logistic reasons, we do not sell serum or lysates that we use internally for positive or negative control.
Q: Where can I find troubleshooting information? What should I do if I have unexpected bands, high background, no signal, weak signal
A: You can find Boster's troubleshoot guides under tech support tab. Please contact us for further assistance on troubleshooting your experiment.
Q: What is the immunogen sequence of this antibody? Is this antibody polyclonal or monoclonal?
A: You can find the immunogen sequence under "Immunogen" and clonality in the product name.
Q: What is the expected band size? Why is it different than the observed band size?
A: The expected band size is predicted on the size of the protein. The actual band size may be affected by a few other factors including but not limited to:
1. Post-translational modification:phosphorylation, methylation, glycosylation etc. These modifications prevent SDS molecules from binding to the target protein and thus make the band size appear larger than expected
2. Post-translational cleavage: this can cause smaller bands and or multiple bands

3. Alternative splicing: the same gene can have alternative splicing patterns generating different size proteins, all with reactivities to the antibody.

4. Amino Acid R chain charge: SDS binds to positive charges. The different size and charge of the Amino Acid side chains can affect the amount of SDS binding and thus affect the observed band size.
5. Multimers: Multimers are usually broken up in reducing conditions. However if the interactions between the multimers are strong, the band may appear higher.,
Q: What is the suggested dilution ratio for Western Blot (WB), Immunohistochemistry (IHC) and or ELISA standards? What is the optimal pH for the sample?
A: Check the datasheet for the product for details on dilution ratios for different experiments. You can find the datasheet button on the right side of the product page.
Q: What is the protocol you used for your Western blotting (WB) and Immunohistochemistry (IHC)?
A: Check our protocols under the tech support tab.
Q: What are some alternative names that could be used to describe this product?
A: Some common names include but are not limited to erbb3 antibody, her3 antibody, erbb 3 antibody, her 3 antibody