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Certain features of Sigma-Aldrich.com will be down for maintenance the evening of Friday August 18th starting at 8:00 pm CDT until Saturday August 19th at 12:01 pm CDT.   Please note that you still have telephone and email access to our local offices. We apologize for any inconvenience.

Website Help System

Oligos & Peptides

We now offer custom oligonucleotides, peptides and antisera packages manufactured by Sigma-Aldrich through the web site.

NOTE: This capability is now available for most countries, but not all. Although a "Custom Products" link appears for all users within the site header, customers in countries not yet supported will be redirected to a separate Sigma-Aldrich or Sigma-Proligo site.

For an Oligo order demonstration, click here .

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How to create an order for custom products:

  1. Click the "Custom Products" link under "Products" on the top banner of our site.
  2. Select the product type you will be ordering from.
  3. Select the product description link to access a configuration tool that will allow you to define the attributes of the product. Separate help topics are available for batch loading Multiple Oligonucleotides and Multiple Peptides .
  4. Assign a name to your custom product and then select all the appropriate attributes. Oligos, for instance will require a scale, purification method and base sequence from 5’ to 3’ and may include a predefined set of IUB redundancies or modifications.
  5. Once you have made all your selections, click on the "Preview Price" button to run the validation routine for your product. Any errors resulting from that validation will be displayed at the top of the page.
  6. When the validation is successful, additional information about the product will be displayed including length, molecular weight and other calculations specific to the product type. In most cases, you should also see the price. If an item is a valid configuration but could not be priced, "Quote Item" will be displayed instead of the price. Note: If you proceed to the shopping cart with at least one "Quote Item", the entire cart will be handled as a request for quotation.
  7. After successful validation, you can still edit your product’s attributes by simply making changes to the items on the page and then clicking the "Preview Price" button to run the validation routine against these changes.
  8. When you have successfully validated all your custom oligos, peptides and/or antisera packages, click the "Add To Cart" button at the bottom of your custom items list. This will transfer all your items to the shopping cart.
  9. To access your cart and place an order (or request a quote) click the "Cart" link in the site header. From this point on, the ordering process for custom products is just like that for prepackaged standard reagents. Once in the cart, you can change shipping methods, add or remove items, Save the Cart to submit it later, Cancel Order, Print Preview your order, or Submit your order or quote. For help on using the shopping cart, click here .