Introduction
Stool samples are widely used as a non-invasive source for molecular biology research, containing microbial DNA, food-derived DNA and host-derived DNA. However, stool DNA extraction is challenged by low host DNA content, partial nucleic acid degradation and, most critically, the presence of a wide range of PCR inhibitors.
Stool samples typically contain polysaccharides, bile salts, bile pigments and other digestion-derived compounds that can interfere with enzymatic reactions and reduce downstream detection efficiency. Effective DNA extraction therefore requires not only efficient cell disruption, but also reliable removal of inhibitory substances.
The HiPure Stool DNA Kit is developed to address these challenges through a workflow combining bead-assisted mechanical lysis with adsorbent-based purification. The system is designed to reduce inhibitor background while maintaining DNA recovery from complex fecal matrices.
Within the Magen microbial DNA extraction systems, this kit serves as the standard column-based solution for stool microbiome studies. For automated extraction workflows, laboratories may refer to MagPure Stool DNA Kit, while RNA-based analysis can be supported using HiPure Stool RNA Kit.
Details
Extraction Principle
Stool samples are first subjected to bead-assisted mechanical disruption combined with chemical lysis to release microbial DNA from complex fecal matrices.
Following lysis, an adsorbent-based cleanup step is applied to selectively remove inhibitory substances such as bile salts, polysaccharides and digestion-derived contaminants while minimizing nucleic acid loss. Under chaotropic binding conditions, DNA is adsorbed onto a silica membrane and purified through sequential washing steps to remove residual impurities. Purified DNA is then eluted for downstream molecular analysis.
Engineering Features
Targeted inhibitor removal system
Specialized adsorption chemistry reduces bile salts, polysaccharides and other PCR-inhibiting substances present in stool samples
Balanced purification performance
Adsorbent-based cleanup is optimized to reduce inhibitor carryover while maintaining DNA recovery
Bead-assisted lysis for complex matrices
Mechanical disruption supports DNA release from diverse microbial populations in fecal samples
Column-based workflow compatibility
Silica membrane purification enables stable DNA recovery suitable for routine laboratory workflows
Validation
DNA extracted from human and animal stool samples demonstrated consistent purity and was directly compatible with 16S PCR amplification without additional cleanup, indicating effective removal of inhibitory substances and stable DNA recovery.
Kit Contents
|
Contents
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D314102F
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D314103F
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|
Purification Times
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50 Preps
|
250 Preps
|
|
HiPure DNA Mini Columns II
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50
|
250
|
|
2ml Collection Tubes
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50
|
250
|
2ml Bead Tubes
|
50
|
250
|
Proteinase K
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24 mg
|
120 mg
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|
Protease Dissolve Buffer
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1.8 ml
|
10 ml
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Buffer STL
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40 ml
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180 ml
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Buffer PCI
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20 ml
|
90 ml
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Buffer SL
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5 ml
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25 ml
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|
Buffer GWP
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70 ml
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2 x 170 ml
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|
Buffer GW2*
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20 ml
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2 x 50 ml
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|
Elution Buffer
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15 ml
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60 ml
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Storage and Stability
Proteinase K and Buffer PCI should be stored at 2-8°C upon arrival. However, short-term storage (up to 12 weeks) at room temperature (15-25°C) does not affect their performance. The remaining kit components can be stored at room temperature (15-25°C) and are stable for at least 18 months under these conditions. The entire kit can be stored at 2–8°C, but in this case buffers should be redissolved before use. Make sure that all buffers are at room temperature when used.
Purchase Guide
For guidance on selecting the most appropriate nucleic acid extraction system based on sample type, input volume and workflow requirements:
👉 Magen Kits Selection Guide
