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Cell-Free DNA Extraction Kits for Liquid Biopsy

Cell-free DNA extraction kits purify circulating cfDNA fragments, typically 100-500 bp in size, from plasma, serum, or urine using silica spin columns or silica-coated magnetic particles, with input volumes ranging from under 1 ml to over 10 ml depending on the kit. Buffer chemistry is optimized to maximize recovery of short cfDNA fragments for downstream qPCR, NGS, and bisulfite sequencing in liquid biopsy and biomarker discovery research.

Researchers working on non-invasive biomarker projects can choose between column-based and magnetic bead-based chemistry depending on automation needs, and MBP's specialist team can help match input volume and elution requirements to your assay. Request a quote today by contacting customerservice@mbpinc.net

Cell-Free DNA

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D4086

MAGicBead™ cfDNA Isolation Kit

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USD21.28 - USD1,017.45

Online Price:

USD15.20 - USD726.75

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D4076

Quick-cfDNA™ Serum & Plasma Kit

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USD31.92 - USD1,343.30

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USD22.80 - USD959.50

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What Are Cell-Free DNA Extraction Kits?

A cell-free DNA (cfDNA) extraction kit purifies circulating cfDNA fragments from plasma, serum, or urine using silica spin-column or magnetic bead-based technologies. These kits are optimized to recover the short DNA fragments commonly found in liquid biopsy samples for downstream applications such as PCR, qPCR, next-generation sequencing (NGS), and methylation analysis. Choose a cfDNA-specific kit over a general genomic DNA kit whenever short circulating DNA fragments are the primary target.

What you will find:

MagBio cfKapture ccfDNA Extraction Kit: for cell-free DNA isolation using advanced magnetic bead-based technology.
MAGicBead™ cfDNA Isolation Kit: for automated, high-throughput liquid biopsy workflows using high-binding paramagnetic particles.
Quick-cfDNA™ Serum & Plasma Kit: for streamlined manual benchtop purification using rapid spin-column technology.

How to Choose a Cell-Free DNA Extraction Kit

Input Volume Range

Choose a kit compatible with your typical plasma, serum, or urine input volume. Larger sample volumes generally increase total cfDNA recovery but may require additional reagents and longer processing times.

Column-Based vs. Magnetic Bead-Based Chemistry

Silica spin-column kits are widely used for manual purification workflows, while magnetic bead-based kits simplify automation and high-throughput processing on compatible liquid handling platforms.

Elution Volume for Downstream Assays

Select an elution volume that matches the input requirements of your downstream applications, such as PCR, qPCR, or NGS library preparation, to minimize additional concentration or dilution steps.

Combined DNA/RNA Recovery

If your workflow requires analysis of both circulating DNA and RNA from the same specimen, consider kits designed to recover multiple nucleic acid types from a single sample.

Specifications Context

Key considerations when selecting a cell-free DNA extraction kit include sample input volume, purification chemistry, compatibility with manual or automated workflows, and elution volume for downstream molecular assays. Magnetic bead-based systems are commonly selected for scalable, automated liquid biopsy workflows, while spin-column kits provide reliable manual purification for routine laboratory use. The optimal kit depends on your sample type, throughput requirements, and downstream analytical methods.

MBP's specialist team can help match kit chemistry, format, and throughput to your sample type and downstream application. Contact the MBP team for personalized guidance.

FAQ

Cell-free DNA extraction kits are designed to recover circulating cfDNA fragments, typically in the 80 to 500 base pair range, from plasma, serum, or urine. Buffer chemistry in cfDNA-specific kits is optimized to maximize recovery of these short fragments, which general genomic DNA kits optimized for longer fragments may not retain as efficiently. This fragment size range is relevant for liquid biopsy and biomarker discovery applications.

Cell-free DNA extraction kits vary widely in input volume capacity, from under 1 milliliter up to greater than 10 milliliters of plasma or serum, with some kits allowing protocol scaling across this entire range using the same chemistry. Match input volume to your typical collection volume, since larger input volumes generally yield more total cfDNA but may require proportionally larger reagent volumes and longer processing times.

Column-based cfDNA kits use silica spin columns and are well established in clinical and research applications, while magnetic bead-based kits using silica-coated paramagnetic particles eliminate phenol/chloroform and have shown superior recovery compared to column-based competitors in some published comparisons. Magnetic bead-based chemistry is generally easier to scale to automated platforms for higher-throughput liquid biopsy pipelines. Choose based on your automation needs and any published comparison data for your specific application.

Some cell-free DNA extraction kits offer elution volumes as low as 14 microliters for concentrated output suitable for assays with limited input volume requirements, while others elute in larger volumes more suited to splitting across multiple downstream reactions. If your downstream assay has a defined input volume range, matching elution volume accordingly avoids unnecessary concentration or dilution steps. Confirm elution volume specifications against your specific NGS library prep or qPCR assay requirements.

Some cell-free DNA extraction kits co-purify cell-free DNA and RNA, including miRNA, from the same plasma or serum sample in parallel eluates. This is useful for studies requiring both DNA mutation analysis and RNA expression data from limited-volume liquid biopsy samples. If your study design requires both nucleic acid types from the same collection, a combined kit avoids splitting limited sample volume across two separate extractions.

DNA purified using cell-free DNA extraction kits is generally suitable for bisulfite sequencing and methylation-based analyses in addition to standard qPCR and NGS workflows. The buffer chemistry optimized for short fragment recovery is compatible with the additional chemical treatment bisulfite conversion requires. Confirm your specific kit's compatibility with your bisulfite conversion protocol before proceeding.

Cell-free DNA quantification commonly uses qPCR with primers targeting repetitive sequences such as ALU elements, as well as fluorescent dye-based methods and microelectrophoretic measurements for fragment size distribution assessment. Recovery efficiency comparisons between extraction methods are often based on these quantification approaches using spiked-in oligonucleotides or reference plasma. Confirm which quantification method your downstream workflow expects before reporting cfDNA yield.

MBP supplies cell-free DNA extraction kits in both column-based and magnetic bead-based formats to liquid biopsy and biomarker discovery research programs across the United States and Canada, with a US office in Houston, Texas. As a registered vendor for institutions including Howard Hughes Medical Institute, Vanderbilt University, and MD Anderson Cancer Center, MBP supports purchase-order and grant-funded ordering for cancer research and non-invasive genotyping programs. Contact the specialist team for guidance on input volume and elution requirements for your assay.

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