Recombinant Mouse HER3 / ERBB3 Protein (His Tag)

Name: Recombinant Mouse HER3 / ERBB3 Protein (His Tag)
Brand: Beta LifeScience
SKU: BLPSN-2416
Availability: InStock

Collections: Antibody / cell therapy targets, Car-t cell therapy targets, Recombinant proteins

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Product Overview

Tag	His
Host Species	Mouse
Accession	Q61526
Synonym	ERBB3, ErbB-3, HER3, LCCS2, MDA-BF-1, c-erbB-3, c-erbB3, erbB3-S, p180-ErbB3, p45-sErbB3, p85-sErbB3, erb-b2 receptor tyrosine kinase 3, FERLK
Background	Receptor tyrosine-protein kinase erbB-3, also known as HER3 (human epidermal growth factor receptor 3), is a membrane bound protein that in humans is encoded by the ERBB3 gene.ErbB3 is a member of the epidermal growth factor receptor (EGFR/ERBB) family of receptor tyrosine kinases. The kinase-impaired ErbB3 is known to form active heterodimers with other members of the ErbB family, most notably the ligand binding-impaired ErbB2.ERBB3 (Erb-B2 Receptor Tyrosine Kinase 3) is a Protein Coding gene. Diseases associated with ERBB3 include Lethal Congenital Contracture Syndrome 2 and Erythroleukemia, Familial. Among its related pathways are PI3K/AKT activation and RET signaling. Gene Ontology (GO) annotations related to this gene include protein homodimerization activity and transferase activity, transferring phosphorus-containing groups. An important paralog of this gene is ERBB4.
Description	A DNA sequence encoding the mouse ERBB3 (Q61526) extracellular domain (Met 1-His 641) was expressed, with a C-terminal His tag.
Source	HEK293
Predicted N Terminal	Ser 20
AA Sequence	Met 1-His 641
Molecular Weight	The secreted recombinant mouse ERBB3 comprises 633 amino acids and has a calculated molecular mass of 70 kDa. As a result of glycosylation, the apparent molecular mass of the recombinant protein is approximately 95 kDa in SDS-PAGE under reducing conditions.
Purity	>93% as determined by SDS-PAGE
Endotoxin	< 1.0 EU per μg of the protein as determined by the LAL method
Bioactivity	Measured by its binding ability in a functional ELISA.1. Immobilized mouse ErbB3-His at 10 ug/ml (100 ul/well) can bind biotinylated human NRG1 (isoform Beta1) with a linear range of 0.018-0.125 ug/ml.2. Immobilized mouse ErbB3-His at 10 ug/ml (100 ul/well) can bind biotinylated human NRG1 (aa 2-246)-Fc with a linear range of 6.25-100 ng/ml.
Formulation	Recombinant Mouse HER3 / ERBB3 Protein (His Tag) was lyophilized from sterile PBS, pH 7.4
Stability	Recombinant Mouse HER3 / ERBB3 protein is stable up to 1 year at -70°C
Usage	For Research Use Only
Storage	Store the protein under sterile conditions at -20°C to -80°C. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.

FAQs

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Proteins are sensitive to heat, and freeze-drying can preserve the activity of the majority of proteins. It improves protein stability, extends storage time, and reduces shipping costs. However, freeze-drying can also lead to the loss of the active portion of the protein and cause aggregation and denaturation issues. Nonetheless, these adverse effects can be minimized by incorporating protective agents such as stabilizers, additives, and excipients, and by carefully controlling various lyophilization conditions.

Commonly used protectant include saccharides, polyols, polymers, surfactants, some proteins and amino acids etc. We usually add 8% (mass ratio by volume) of trehalose and mannitol as lyoprotectant. Trehalose can significantly prevent the alter of the protein secondary structure, the extension and aggregation of proteins during freeze-drying process; mannitol is also a universal applied protectant and fillers, which can reduce the aggregation of certain proteins after lyophilization.

Our protein products do not contain carrier protein or other additives (such as bovine serum albumin (BSA), human serum albumin (HSA) and sucrose, etc., and when lyophilized with the solution with the lowest salt content, they often cannot form A white grid structure, but a small amount of protein is deposited in the tube during the freeze-drying process, forming a thin or invisible transparent protein layer.

Reminder: Before opening the tube cap, we recommend that you quickly centrifuge for 20-30 seconds in a small centrifuge, so that the protein attached to the tube cap or the tube wall can be aggregated at the bottom of the tube. Our quality control procedures ensure that each tube contains the correct amount of protein, and although sometimes you can't see the protein powder, the amount of protein in the tube is still very precise.

To learn more about how to properly dissolve the lyophilized recombinant protein, please visit Lyophilization FAQs.