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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.

What indexing primers should I use with the xGen Prism DNA Library Prep Kit?

The xGen Prism DNA Library Prep Kit has been optimized with the xGen Unique Dual Index (UDI) Primer Pairs, which feature carefully designed indexes that maximize edit distance and enable ultra-high multiplexing. In addition, the xGen UDI Primer Pairs are provided in a convenient, single-use package. For custom index designs or different packaging formats, contact


*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.