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Recombinant Human GDF3

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Product Source Size Cat. No. Price
Recombinant Human GDF3 E. coli20 µg Z101735 $130.00
1.0 mg Z101739 $3,500.00
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Data Sheet
Print Version
Alternative Names GDF-3
Recombinant Human Growth Differentiation Factor 3 (GDF3)
Description GDF-3 is a growth and differentiation factor which belongs to the TGF-beta superfamily. GDF-3 and GDF-9 are the only two members of the family which do not form disulfide-linked dimers. GDF-3 has been found in adult bone marrow, spleen, thymus, and adipose tissue. Although signaling in all other members of the family involve the BMP receptors ALK1,2,3, and 6, GDF-3 signals through BMP receptors ALK4 and 7.
Gene Symbol GDF3
Gene ID 9573
Accession No. Q9NR23
Source E. coli
Appearance Lyophilized Powder
Molecular Weight 13.0 kDa
Endotoxin Level <1.0 EU/μg of recombinant protein as determined by the LAL method.
Purity >95% as determined by SDS-PAGE
Bioactivity Measured by its ability to induce Smad2 phosphorylation in P19 mouse embryonal carcinoma cells.
Formulation Lyophilized from a 0.2 μm filtered solution in 10mM HCl & 5 µg BSA/µg of protein.
Reconstitution Reconstitute at 0.1mg/mL in 4 mM HCl containing at least 0.1% human or bovine serum albumin.
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.
Usage For research use only. Not for diagnostic or therapeutic use.
Product Documents
Product References
FAQs
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How are endotoxin levels measured?
1. For estimating the endotoxin levels; we use the LAL (Limulus Amebocyte Lysate) method: The lysate from horseshoe crab amebocytes clots in the presence of very low endotoxin. This reaction is the basis of the Limulus amebocyte lysate (LAL) assay which was approved by the FDA in 1970.

· Endotoxin is generally measured in Endotoxin Units per milliliter (EU/mL).

· For recombinant proteins: EU is reported per microgram of protein.

· One EU = 0.1-0.2 ng endotoxin/µg of protein.

· At abm, we do the LAL chromogenic assays that can detect down to 0.01 EU/ml.
With regard to the BSA levels in some Growth Factors and Cytokines, can you please provide an explanation as to why they are so high?
The amount of BSA, as part of the formulation of a protein, can vary considerably depending on how much BSA was deemed optimum/necessary for protein stability in combination with /in-lieu of - other possible additives. The aforementioned formulations are somewhat analogous to the “carrier” versions of many formulations from “R and D systems” that have as high as 50 µg of BSA per µg of the recombinant protein product. If, needed or desired, abm scientists can substitute BSA for other stabilizing additives for most formulations.
Are your Escherichia coli sourced growth factors: 1) Human derived materials free? 2) Recombinant proteins free?
Yes, all of abm's growth factors made in Escherichia coli using recombinant technology contain no human derived-products or other recombinant proteins. In the rare cases of BSA presence, this will be mentioned in the product's formulation.
Could you please confirm that this is the mature chain aa's 251-364?
Yes, the mature chain is from amino acid 251 to 364 inclusive.