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Frequently asked questions

Our Scientific Applications Support team has assembled a list of frequently asked questions to help you find answers quickly. Filter using one or more categories to focus on specific topics, or use the search bar to perform a text search.

How do I enter RNA sequences online?

Oligonucleotides containing at least one RNA base must be ordered from our Custom RNA Oligos ordering page. RNA bases are entered with a lower-case “r” preceding the desired base (e.g., rA, rC, rG, rU).

For your convenience, the “Convert to RNA” button under the sequence entry box will add a lower-case “r” in front of all bases and change all T bases to U bases. Please note that you can use this same method to order RNA/DNA chimeras.

To denote the DNA bases, simply use the capital letter of the desired base type (e.g., A, C, G, T). There is no extra charge for DNA bases in an RNA sequence beyond the standard per base charge for DNA on the scale requested.

Custom DNA & RNA

*RUO—For research use only. Not for use in diagnostic procedures. Unless otherwise agreed to in writing, IDT does not intend for these products to be used in clinical applications and does not warrant their fitness or suitability for any clinical diagnostic use. Purchaser is solely responsible for all decisions regarding the use of these products and any associated regulatory or legal obligations.