I1146 Sigma

R3 IGF-1 human

recombinant, expressed in E. coli, lyophilized powder, suitable for cell culture



Related Categories Cell Culture, Growth Factor Analogs, Growth Factors and Cytokines, Insulin-like Growth Factors (IGF), Reagents and Supplements More...
biological source   human
recombinant   expressed in E. coli
assay   ≥85% (HPLC)
form   lyophilized powder
potency   ≤10 ng/mL ED50
quality   endotoxin tested
mol wt   7,676 Da
packaging   pkg of 1 mg
suitability   suitable for cell culture
UniProt accession no.   P05019
storage temp.   2-8°C
Gene Information   human ... IGF1(3479)



R3 IGF-I is a recombinant analog of insulin-like growth factor containing the complete human IGF-I amino acid sequence with substitution of Arg for Glu3. It was developed as an inexpensive, high quality potent analog of IGF for use as a growth factor supplement for serum-free or low serum cell culture.

Recombinantly produced in E. coli using a patented expression system, the peptide is harvested from cells in inclusion bodies, which are dissolved and desalted. The active molecule is properly folded under oxidizing conditions and then purified by several liquid chromatography steps.

Biochem/physiol Actions

Product stimulates protein synthesis in L6 myoblasts.

Other Notes

Recombinant analog of insulin-like growth factor-I with the substitution of Arg for Glu at position 3.

Preparation Note

Prepared from 0.1 M acetic acid

Safety & Documentation

Safety Information

NONH for all modes of transport
WGK Germany 


Certificate of Analysis (COA)

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Certificate of Origin (COO)

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Frequently Asked Questions

Which document(s) contains shelf-life or expiration date information for a given product?
If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.
How do I get lot-specific information or a Certificate of Analysis?
The lot specific COA document can be found by entering the lot number above under the "Documents" section.
How do I find price and availability?
There are several ways to find pricing and availability for our products.Once you log onto our website, you will find the price and availability displayed on the product detail page.You can contact any of our Customer Sales and Service offices to receive a quote. USA customers: 1-800-325-3010 orview local office numbers.
What is the Department of Transportation shipping information for this product?
Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product.
How do the sequences of Products I1146 and I1271 compare to that of native Insulin-like Growth Factor 1 (IGF-1)?
The entire IGF-1 gene codes for 194 amino acids, but the mature form of the protein is 70 amino acids, consisting of amino acids 49-118.Product I1146 is R3 IGF-1, which is also 70 amino acids in length. The Glutamic acid (E) at position 3 has simply been replaced by an Arginine (R). So the sequence of Product I1146 is:GP RTLCGAELVD ALQFVCGDRG FYFNKPTGYG SSSRRAPQTG IVDECCFRSC DLRRLEMYCA PLKPAKSAProduct I1271 is the same as I1146, but with an additional thirteen amino acids "in front of" the normal N-terminus of the R3 IGF-1:MFPAM PLSSLFVNGP RTLCGAELVD ALQFVCGDRG FYFNKPTGYG SSSRRAPQTG IVDECCFRSC DLRRLEMYCA PLKPAKSANote that the first 13 amino acids in the recombinant I1271 (MFPAMPLSSLFVN)are quite different from what would have been the preceding 13 amino acids in the immature IGF-1.
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