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.

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Why does my sequence data have errors?

Even with clonally pure samples, sequencing traces rarely show 100% sequence identity. This is because errors do occur during sequencing reactions and the subsequent data analysis. These error rates are typically between 0.1% and 0.01%, but they can be locally elevated in regions of extreme GC content or secondary structure. Misalignment of the traces can also occur, particularly in highly repetitive sequences. Finally, small subpopulations of sequence variants can arise during propagation of E. coli.