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I1884 Sigma

Insulin-transferrin-sodium selenite media supplement

γ-irradiated, lyophilized powder, BioXtra, suitable for cell culture

Synonym: ITS Supplement



Related Categories Cell Culture, Hybridoma Media Supplements, Hybridoma Platform, ITS and Other Supplements, Reagents and Supplements,
sterility   γ-irradiated
product line   BioXtra
form   lyophilized powder
suitability   suitable for cell culture
storage temp.   −20°C


Frequently Asked Questions

Frequently Asked Questions are available for this Product.

Other Notes

Each vial contains: ≥21 mg recombinant human insulin; ≥19 mg human transferrin (substantially iron free), and 25 μg sodium selenite.

ITS is a mixture of recombinant human insulin, human transferrin, and sodium selenite. It is a general cell supplement designed for use in non-complex media (e.g. MEM, RPMI-1640) and complex media (e.g. Ham?s F-12, DME/F-12, MEM) with sodium pyruvate.


Each vial sufficient to prepare 5 liters of medium.


Serum-free and reduced serum formulations often require purified forms of the factors normally supplied by serum that are suitable for in vitro growth and differentiation studies. These important factors include insulin, transferrin, selenium, pyruvate, and ethanolamine.

INSULIN is a polypeptide hormone that promotes the uptake of glucose and amino acids and may owe observed mitogenic effect to this property.

TRANSFERRIN is an iron-transport protein. Iron is an essential trace element, but can be toxic in the free form. To nourish cells in culture, it is supplied bound to transferrin in serum.

SELENIUM is an essential trace element normally provided by Serum.

Nutritional studies indicate that the supplement components described are utilized by most mammalian cells. They enhance cell proliferation and decrease the serum requirement of many cell types. When the provided supplement is used with 2 to 4 percent serum, proliferation is reported to be similar to medium supplemented with 10 percent serum.

Price and Availability

All labs need water
Safety & Documentation

Safety Information

NONH for all modes of transport
WGK Germany 

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.
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 should I reconstitute I1884, Insulin-transferrin-sodium selenite media supplement (ITS Supplement)?
First, make acidified water by adding acetic acid to reduce the pH to approximately 2. To prepare a stock solution, dissolve the contents of the vial in 5 mL sterile, acidified water and swirl to dissolve. Then add 45 mL of sterile water. This prepared solution is at 100X.  It is diluted 100 fold (1 ml to 100 ml) to give a 1X final concentration. This information is located in the product usage sheet found on our website: http://www.sigmaaldrich.com/etc/medialib/docs/Sigma/Usage/i1884use.Par.0001.File.tmp/i1884use.pdf
What is the stability of I1884, Insulin-transferrin-sodium selenite media supplement (ITS Supplement), in solution?
The stock solution can be frozen in working aliquots. Avoid repeated freeze/thaw cycles. Frozen working aliquots will be stable for at least one year. The solution is stable at 2-8°C for 30 days. This information is located in the product usage sheet found on our website: http://www.sigmaaldrich.com/etc/medialib/docs/Sigma/Usage/i1884use.Par.0001.File.tmp/i1884use.pdf
What is the activity of insulin in I1884, Insulin-transferrin-sodium selenite media supplement (ITS Supplement)?
The starting material has an activity of greater than or equal to 25.2 USP units/mg insulin.  The concentration of insulin at 100X is 5 mg/L.
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.
  What kind of solution is the A5955 - Antibiotic Antimycotic Solution (100×), Stabilized product suspended in?
A5955 - Antibiotic Antimycotic Solution (100×), Stabilized is supsended in a sodium citrate buffer solution. Source: Israel production group
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Protocols & Articles

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