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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.

Is there a recommended bioinformatics workflow for the xGen™ Broad-Range Library Prep Kit?

Adaptase™ technology, used in the xGen™ Broad-Range RNA Library Prep Kit, adds a low complexity polynucleotide tail with a median length of 8 bases to the 3’ end of each fragment during the addition of the first NGS adapter molecule. Therefore, it is normal and expected to observe them at the beginning of Read 2 (R2).

When read length is close to fragment size, the tail may also be observed toward the end of Read 1 (R1) data. We recommend using the STAR aligner (Dobin et al. 2013) as it is able to soft clip the synthetic tail sequence and provides efficient mapping without additional processing of your sequencing data.

For additional details, please refer to the Appendix section of the xGen Broad-Range RNA Library Prep Kit Protocol pertaining to Data Analysis and Informatics.

*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.