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Does anyone have feedback on the Kapa HyperPlus enzymatic DNA fragmentation vs Covaris? I have access to a Covaris but the enzymatic method would be much more convenient... assuming it works well!
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Almost all suppliers in their technotes claim that their enzymatic DNA fragmentation gives similar or better results than Covaris or their competitors. My comments:
1- Shearing is not sensitive to buffer or DNA quality to some extent, but all the enzymatic methods require or prefer a particular buffer for best results.
2- Buffer requirement is really annoying for core centres dealing with DNA from different clients
3- The enzymatic methods are time or quantity sensitive requiring special attention
4- These methods are acceptable for labs that do not have access to Covaris or desire fast high throughput fragmentation -
I agree with nucacidhunter. Covaris shearing will produce much more consistent size distributions across all your samples. When I tried to use KAPA fragmentation enzyme, size distributions were highly sensitive to the input DNA concentrations. Samples with small DNA concentrations (<100ng) required much shorter time for fragmentation than those with ~500ng. And samples with DNA concentration >750ng always produced libraries with a large portion of long fragments. Therefore, be prepared to spend some time and reagents for calibration before you actually start doing your libraries with enzymatic fragmentation.Comment
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I’m not a sequencing expert. I’m a purification scientist who uses NGS to evaluate workflows my group develops. With this perspective, we think about the sample first and the NGS workflow second. The sequencer is an exceptionally honest reporter, but it can only report on what you give it, so whether you get clean, interpretable data from an NGS workflow is largely determined before you begin.
Here are nine questions we think about, in roughly the order they matter, before...06-18-2026, 07:11 AM -
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
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