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

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) is the recombinant human-derived NRG1-beta 1 protein, expressed by E. coli , with tag free. The total length of NRG1-beta 1 Protein, Human (245a.a) is 245 a.a., with molecular weight of ~32-34.0 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.

Measured in a serum-free cell proliferation assay using MCF-7 human breast cancer cells. The ED₅₀ for this effect is 9.021ng/mL, corresponding to a specific activity is 1.1×10⁵ units/mg

Human

E. coli

Tag Free

Q02297-6/AAA58639.1 (S2-K246)

3084  [NCBI]

SERKEGRGKGKGKKKERGSGKKPESAAGSQSPALPPQLKEMKSQESAAGSKLVLRCETSSEYSSLRFKWFKNGNELNRKNKPQNIKIQKKPGKSELRINKASLADSGEYMCKVISKLGNDSASANITIVESNEIITGMPASTEGAYVSSESPIRISVSTEGANTSSSTSTSTTGTSHLVKCAEKEKTFCVNGGECFMVKDLSNPSRYLCKCPNEFTGDRCQNYVMASFYKHLGIEFMEAEELYQK

Approximately 32-34.0 kDa

Greater than 85% as determined by reducing SDS-PAGE.

Lyophilized powder.

Lyophilized from a 0.2 μm filtered solution of PBS, 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.