NRG1-beta 1 Protein, Human (245a.a, HEK293, Fc)

HRG1-β1 belongs to a family of structurally-related polypeptide growth factors derived from alternatively spliced genes, induces Fn14 expression in MCF7 cells. NRG1-beta 1 Protein, Human (245a.a, HEK293, Fc) is the recombinant human-derived NRG1-beta 1 protein, expressed by HEK293 , with N-hFc labeled tag. The total length of NRG1-beta 1 Protein, Human (245a.a, HEK293, Fc) is 245 a.a., with molecular weight of 58-83 kDa.

HRG1-β1 activates HER2/HER3 signaling and up-regulate Fn14 gene expression in parental MCF7 cells. HRG1-β1-mediated Fn14 up-regulation in MCF7/HER2-18 cells is required for maximal MMP-9 production.

1. Measured by its binding ability in a functional ELISA.Immobilized Human ERBB3 His at 2 μg/mL (100 μl/well) can bind Human NRG1 Fc , the EC₅₀ of Human NRG1 Fc is 8-40 ng/mL.
2. Measured by its binding ability in a functional ELISA.Immobilized Rhesus ERBB3 His at 2 μg/mL (100 μl/well) can bind Human NRG1 Fc , the EC₅₀ of Human NRG1 Fc is 20-80 ng/mL.
3. Measured in a serum-free cell proliferation assay using MCF-7 human breast cancer cells. The ED₅₀ this effect is 0.1087-7.029 ng/mL, corresponding to a specific activity is 1.4227×10⁵ - 9.20×10⁶ units/mg.

• 
  Measured in a serum-free cell proliferation assay using MCF-7 human breast cancer cells. The ED₅₀ this effect is 7.029 ng/mL, corresponding to a specific activity is 1.4227×10⁵ units/mg.

Human

HEK293

N-hFc

Q02297-6 (S2-K246)

3084  [NCBI]

SERKEGRGKGKGKKKERGSGKKPESAAGSQSPALPPRLKEMKSQESAAGSKLVLRCETSSEYSSLRFKWFKNGNELNRKNKPQNIKIQKKPGKSELRINKASLADSGEYMCKVISKLGNDSASANITIVESNEIITGMPASTEGAYVSSESPIRISVSTEGANTSSSTSTSTTGTSHLVKCAEKEKTFCVNGGECFMVKDLSNPSRYLCKCPNEFTGDRCQNYVMASFYKHLGIEFMEAEELYQK

58-83 kDa

• 
  Greater than 95% as determined by reducing SDS-PAGE.

Lyophilized powder

Lyophilized from a 0.2 μm filtered solution of PBS, pH 7.4 or 20 mM PB, 150 mM NaCl, pH 7.4.

<1 EU/μg, determined by LAL method.

It is not recommended to reconstitute to a concentration less than 100 μg/mL in ddH₂O. For long term storage it is recommended to add a carrier protein (0.1% BSA, 5% HSA, 10% FBS or 5% Trehalose).

Stored at -20°C for 2 years. After reconstitution, it is stable at 4°C for 1 week or -20°C for longer (with carrier protein). It is recommended to freeze aliquots at -20°C or -80°C for extended storage.

Room temperature in continental US; may vary elsewhere.