Neuregulins (NDF, heregulin, GGF ARIA, or SMDF) are EGF-like growth and differentiation factors that signal through tyrosine kinase receptors of the ErbB family. The ErbB2 and ErbB4 receptors cooperate in transmission of neuregulin-1 signals in the heart, whereas ErbB2 and ErbB3 cooperate in neural crest cells.
Alternative Names
Breast cancer cell differentiation factor p45 ; Glial growth factor ; Heregulin ; HRG ; Neu differentiation factor ; Sensory and motor neuron-derived factor ; GGF2 ; Pro-neuregulin-1 ; membrane-bound isoform ; Acetylcholine receptor-inducing activity ; ARIA
Quantity
50 µg
Regulatory
RUO
Source
E. coli
Host
Human
Endotoxin Level
<1.0 EU/μg of recombinant protein as determined by the LAL method.
Biological Activity Comment
The ED(50) was determined by the dose-dependent phosphorylation of human MCF-7 cells was found to be < 20 ng/mL, corresponding to a specific activity of 5.0 x 10^4 Units/mg.
Weight
34.0 kDa
Description
A quick spin of the vial followed by reconstitution in distilled water to a concentration not less than 0.1 mg/mL. This solution can then be diluted into other buffers.
Format
Lyophilized PowderRecombinant GGF2 was lyophilized from a 0.2 μm filtered 0.02M PB, pH 7.0.
Purity
>95% as determined by SDS-PAGE
Storage
The lyophilized protein is stable for at least one year from date of receipt at -70°C. Upon reconstitution, this cytokine can be stored in working aliquots at 2° - 8°C for one month, or at -20°C for six months, with a carrier protein without detectable loss of activity. Avoid repeated freeze/thaw cycles.