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With a show of hands, how many people still do size selection post ligation after shearing genomic DNA by Covaris ? I've heard that many skip size selection now, but many others still size select.
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For exome capture we don't do size selection. We purify with SPRI beads and that adequately removes adapter/primer-dimer. -
Depends how tight of a size distribution you want. We size select post-Covaris to get a narrow distribution allowing assembly of overlapping paired-end reads. Size selection can also help you get longer read lengths since all PCR based sequencing approaches (454, Illumina) do tend to enrich for smaller fragments.Comment
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Data variability is still an issue in sequencing technologies despite the advances in reproducibility and accuracy of these platforms. But the problem does not originate in the sequencing itself, but in the previous steps, before the sample reaches the sequencer.
The first step is collection, followed by preservation and sample preparation for analysis. Most scientists overlook those steps, but not being careful might just be skewing the experiment’s results.
...06-02-2026, 10:05 AM -
With the launch of new single-cell sequencing platforms in 2026, the field stands at an exciting inflection point. This article surveys the most impactful advances in the field and discusses how they’re reshaping research in cancer, immunology, and beyond.
Introduction
Single-cell sequencing technologies have undergone remarkable advances over the past decade, transitioning from low-throughput experimental approaches to highly scalable platforms capable of...05-22-2026, 06:42 AM
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