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I5500 Sigma-Aldrich

Insulin from bovine pancreas

≥25 USP units/mg (HPLC), powder

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Description

Frequently Asked Questions

Frequently Asked Questions are available for this Product.

Biochem/physiol Actions

Two-chain polypeptide hormone produced by the β-cells of pancreatic islets. Its molecular weight is ~5800 Da. The α and β chains are joined by two interchain disulfide bonds. The α chain contains an intrachain disulfide bond. Insulin regulates the cellular uptake, utilization, and storage of glucose, amino acids, and fatty acids and inhibits the breakdown of glycogen, protein, and fat.

Packaging

1 g in poly bottle

50, 100, 250, 500 mg in poly bottle

Price and Availability


All labs need water
Safety & Documentation

Safety Information

RIDADR 
NONH for all modes of transport
WGK Germany 
3

Documents

Certificate of Analysis

Certificate of Origin

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. These documents are located on the product detail page under Useful Links & Tools. Click on the following link to search for a Certificate of Analysis. Please click the following link to see the details on our Product Dating Information.
What is the comparison between International Units (IU) and USP units for insulin?
The international unit (IU) of insulin is based on the International Standard Preparation of Bioassay (1958). The standard preparation is a mixture of 52% bovine and 48% porcine insulin, containing 24 units/mg. Reference: Martindale: The Extra Pharmacopoeia, 29th ed., p. 392. High purity bovine pancreatic insulin typically assays at approximately 27 USP units per mg. So the IU and USP unit are not identical, but they are approximately 1:1.
What can be used to make a solution of insulin?
Insulin is soluble in dilute acids and alkalis. The solubility of insulin is tested at 2 mg/mL in water (acidified to pH 2 with hydrochloric acid). One can also use 1 mL of water acidified to pH 2 with 10 µL of glacial acetic acid to dissolve 2 mg of insulin. A 10 mg/mL solution of bovine insulin in 25 mM HEPES at pH 8.2 is offered as Product No. I0516; here is the link to the detail page for that product: http://www.sigmaaldrich.com/catalog/search/ProductDetail/SIGMA/I0516
How can I store the insulin solution?  How long?
The USP recommends that solutions of insulin be stored at 2-8°C. It is not recommended to freeze solutions of insulin, as it can aggregate. Sterile solutions should be stable for at least 1 year at 2-8°C.
What is the amino acid sequence for insulin?
The sequence and structure of insulin can be found on the product information sheet; here is the link to that document: http://www.sigmaaldrich.com/etc/medialib/docs/Sigma-Aldrich/Product_Information_Sheet/i5500pis.Par.0001.File.tmp/i5500pis.pdf
How many units of insulin are present in my vial of Product I5500, Insulin from bovine pancreas?
Product No. I5500 has a specification of not less than 27 USP units/mg.  The exact value for the product received can be found the on lot-specific Certificate of Analysis. This can be accessed on the website from the product page; see the link below: http://www.sigmaaldrich.com/catalog/search/ProductDetail/SIAL/I5500
How do I get lot-specific information or a Certificate of Analysis?
A Certificate of Analysis is available by lot number and can be obtained through our Advanced Search Option: http://www.sigmaaldrich.com/catalog/AdvancedSearchPage.do
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 or view 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, or search here. 
My question is not addressed here, how can I contact Technical Service for assistance?
Use the option to the right to "Ask a Question" by email of a Technical Service Scientist.
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Protocols & Articles

Articles

HPLC Analysis of Insulin (Species Variants) on Ascentis® Express Phenyl-Hexyl

From our library of Articles, Sigma-Aldrich presents HPLC Analysis of Insulin (Species Variants) on Ascentis® Express Phenyl-Hexyl
Keywords: Chromatography, High performance liquid chromatography

HPLC Analysis of Insulin (Species Variants) on BIOshell™ A160 Peptide C18

From our library of Articles, Sigma-Aldrich presents HPLC Analysis of Insulin (Species Variants) on BIOshell™ A160 Peptide C18
Keywords: Chromatography, High performance liquid chromatography

Plasma Derived Proteins and Enzymes

Despite their complexity, blood and plasma are abundant biological resources for the discovery of drug targets and biomarkers for human disease. It is estimated that plasma may contain as many as 40,...
BioFiles 2006, 1.5, 2.
Keywords: Applications, Gas chromatography, Type

Peer-Reviewed Papers
15

References

Related Products

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Product #

Description

Add to Cart

I0516 Insulin solution from bovine pancreas, 10 mg/mL insulin in 25  mM HEPES, pH 8.2, BioReagent, sterile-filtered, suitable for cell culture
I1882 Insulin from bovine pancreas, γ-irradiated, BioXtra, suitable for cell culture, potency: ≥20 units/mg (USP units), lyophilized powder
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I9278 Insulin solution human, Chemically defined, recombinant from Saccharomyces cerevisiae, sterile-filtered, BioXtra, suitable for cell culture

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