Synonyms	C76256;Erbb-3;Erbb-3r;Erbb3;Erbb3r;Her3
Species	Mouse
Expression_host	HEK293 Cells
Sequence	Met 1-His 641
Accession	Q61526
Application	Functional ELISA
Mol_Mass	70.0 kDa
AP_Mol_Mass	95 kDa
Tag	C-His
Bio_Activity	1. Immobilized mouse ErbB3-His at 10 μg/ml (100 μl/well) can bind biotinylated human NRG1 (isoform Beta1) with a linear range of 0.018-0.125 μg/ml. 2. Immobilized mouse ErbB3-His at 10 μg/ml (100 μl/well) can bind biotinylated human NRG1 (aa 2-246)-Fc with a linear range of 6. 25-100 ng/ml.

Properties

Purity	> 93 % as determined by reducing SDS-PAGE.
Endotoxin level	< 1.0 EU per μg of the protein as determined by the LAL method.
Storage	Generally, lyophilized proteins are stable for up to 12 months when stored at -20 to -80℃. Reconstituted protein solution can be stored at 4-8℃ for 2-7 days. Aliquots of reconstituted samples are stable at < -20℃ for 3 months.
Shipping	This product is provided as lyophilized powder which is shipped with ice packs.
Formulation	Lyophilized from sterile PBS, pH 7.4 Normally 5 % - 8 % trehalose, mannitol and 0.01% Tween80 are added as protectants before lyophilization. Please refer to the specific buffer information in the printed manual.
Reconstitution	Please refer to the printed manual for detailed information.

Background

ErbB3, also known as Her3(human epidermal growth factor receptor3), is a member of the epidermal growth factor receptor (EGFR) family of receptor tyrosine kinases. This membrane-bound glycoprotein has a neuregulin binding domain but has not an active kinase domain., and therefore can not mediate the intracellular signal transduction through protein phosphorylation. However, its heterodimer with ErbB2 or other EGFR members responsible for tyrosine phosphorylation forms a receptor complex with high affinity, and initiates the related pathway which lead to cell proliferation or differentiation. ErbB3 has been shown to implicated in numerous cancers, including prostate, bladder, and breast tumors. This protein has different isoforms derived from alternative splicing variants, and among which, the secreted isoform lacking the intermembrane region modulates the activity of membrane-bound form.

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