We offer over 200 modifications for both DNA and RNA oligonucleotides and probes. We can attach fluorescent dyes to oligos at the 5'-end, 3'-end and internal positions. Our product offering includes common dye modifiers such as 6-FAM™, HEX™, and TET™, as well as exotic modifications.
In addition to standard fluorescent modifications, we have the capabilities to provide dual-labeled probes including Molecular Beacons, LightCycler® Probes, and Scorpions® Probes.
Phosphorothioates (or S-oligos) are a variant of normal DNA in which one of the non-bridging oxygens is replaced by sulfur. The sulfurization of the internucleotide bond creates a molecule that is resistant to cellular nuclease degradation. Sulfur bonds can be introduced at the 5’, 3’, or internal positions.
Minimum Yield Guarantees
*Guarantees are for 20 mers or longer. Oligos shorter than 20 bases will have fewer ODs. Microgram amounts are calculated based on a 30 μg/OD value. If the μg/OD value is less than 30, the reported μg value will be proportionally less. Phosphorothioated yields are 70% of the above stated values. Post-synthesis modifications may yield 50% less than the above stated values.
*For complete label license information, please visit sigmaaldrich.com/oligolicenses.