How can I order an oligo with a modification?
When you order, you should select the Custom DNA Oligos option. At the bottom of the ordering page you will see tabs that say 5' Mods, Internal Mods, & 3' Mods. Most modifications are not available on the 25nmole scale, so if you do not see the modification you are looking for, increase your synthesis scale to at least the 100nm scale. This will increase the menu of modification options available. When you find the modification you would like, click on the Add Mod button to the left, and it will add the appropriate code to your sequence.