The series of DNA Size Selection Kits (Magnetic Beads) were developed for DNA size selection using magnetic beads. A total of 11 kits are available, with different selection ranges spanning from 50 bp to over 10 kb. The kits provide a simple and quick approach for the enrichment of a specific range of DNA fragments. The kit workflow allows double-sided or single-sided size selection for specific size cutoffs.

Gel images of different ranges of size selection. Sheared human genomic DNA was used as input.

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DNA size selection is a selective capture of DNA fragments of a specific range of size for next-generation sequencing (NGS) library preparations, PCR, ChIP assay, DNA ligations, endonuclease digestions, adapter removal, and other genomics and molecular biology applications. DNA size selection is preferred after NGS library prep in most of the cases. The NGS library preparation is related to the quality of the sequencing data. Precise NGS library size selection can increase sequencing efficiency, improve data quality, and reduce costs.

There are two types of sequencing technologies: short-read sequencing and long-read sequencing. Short-read sequencing uses DNA libraries that contain small insert DNA fragments of similar sizes, usually several hundred base pairs. The sequencing efficiency can be improved if the DNA size selection is in the right range. Cat.# 20104S and 20104L are the best kits for NGS library size selection of illumina paired-end 100 (PE100) sequencing with 100-200 bp library inserts; Cat.# 20105S and 20105L are the best kits for NGS library size selection of illumina paired-end 150 (PE150) sequencing with 150-300 bp library inserts; and Cat.# 20106S and 20106L are the best kits for NGS library size selection of illumina paired-end 300 (PE300) sequencing with 300-600 bp library inserts.

Long-read sequencing uses a large DNA fragment as input and makes very long reads. Usually, library size selection is preferred to remove smaller fragments. Cat.# 20110S and 20110L are the best kits for long-read sequencing size selection with DNA sizes >5 kb, and Cat.# 20111S and 20111L are the best kits for long-read sequencing size selection with DNA sizes >10 kb.

The magnetic beads technology uses paramagnetic particles, also known as SPRI (Solid Phase Reversible Immobilization) beads, to bind DNA reversibly and selectively. DNA fragments can be size-selected and purified by changing the properties of the magnetic beads or SPRI beads. The magnetic beads can easily separate the beads-binding DNA from the contaminants and unwanted components in the samples. The samples after DNA size selection are free of contaminants such as buffer components, enzymes, proteins, salts, dNTPs, primers, and adapters. Our proprietary magnetic beads reagents improve yield, selectivity, and reproducibility.

Specific DNA fragments at a certain length range can be purified simply using magnetic separation with different beads components, avoiding tedious and time-consuming gel extraction and column-based purification. The magnetic beads method is popular for common DNA size selection, including library size selection. The first beads-binding step, referred to as the right-side clean-up, removes large DNA fragments. The large DNA fragments are bound to the beads and are discarded. The desired DNA fragments in the supernatant are transferred to a new well, and new beads are added to the supernatant for the second beads-binding, referred to as the left-side clean-up. The double-size selected DNA fragments are eluted after ethanol rinsing.

DNA size selection with dual clean-ups.

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A single clean-up is needed for DNA size selection with large fragments. In this case, only the large DNA fragments are bound to the beads. The selected larger DNA fragments are eluted after ethanol rinsing.

DNA size selection with single clean-up for >5 kb and >10 kb DNA.

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Features of DNA size selection and library size selection

• • • High specificity and high recovery of size selection
    • 11 selection ranges are available, including 5 ranges for NGS library size selection
      • • 50-100 bp
        • 100-200 bp
        • 200-500 bp
        • 250-350 bp: ideal for illumina PE100 sequencing
        • 300-450 bp: ideal for illumina PE150 sequencing
        • 450-750 bp: ideal for illumina PE300 sequencing
        • 500-1000 bp
        • 1-3 kb
        • 1-5 kb
        • >5 kb: ideal for long-read sequencing
        • >10 kb: ideal for long-read sequencing
    • Fast and simple
      • • 20-min protocol
        • No gel purification required
        • No columns required
        • No centrifugation required
    • Efficient removal of contaminants and unwanted components

Product Description

Amp-future DNA Isothermal Amplification Kit NFO with 500-1000copies/µL Detection Limit, 48 Tests/box, -20°C Storage

Product Detail

Kit Storage and term of Validity

Storage term: stored at ≤-20℃,keep away from light, avoid heavy weight and repeated freezing and thawing.

Term of Validity: 14 months

Isothermal nucleic acid Principle Summary

The kit is based on room and constant temperature nucleic acid rapid amplification technology, its principle is that at room and constant temperature, the recombinase and primer form a protein/single-stranded nucleotide complex Rec/ssDNA, and invade the double-stranded DNA template with the help of auxiliary proteins and single-stranded binding protein SSB; then form a D-loop region at the invasion point and start to scan the DNA duplex, after finding the target region complementary to the primer and disintegration of the complex Rec/ssDNA, the polymerase also binds to the 3′ end of the primer to start the chain extension. The kit relies on the role of NFO enzyme and adds the designed specific molecular probes according to the template, and get the result by colloidal gold technology (sandwich method).

Technical Parameters:

Parameters	Details
Product Name	DNA Isothermal Amplification Kit NFO
Manufacturer	Amp-future
Storage Temperature	-20°C
Kit Components	Enzymes, Buffers ,Reagents
Packaging	48 Tests/box
Detection Limit	500-1000copies/µL
Shipping	ICE
Test Time	5-20mins

Isothermal nucleic acid Product Features

1/ High sensitivity and specificity, short reaction time.

2/ The reagent form is freeze-dried, stable and easy to operate.

3/ The reaction can be operated by metal bath and water bath pot without purchasing expensive PCR apparatus.

Isothermal nucleic acid Applications

Suitable for DNA isothermal rapid amplification kit(NFO type)

Primer: Require pair of nucleotide primers with the length of 25-35 bp.

DNA basic kit reaction temperature is 39 to 42℃ and time is 5-20 minutes.

Storage term: stored at ≤-20℃,keep away from light, avoid heavy weight and repeated freezing and thawing.

Term of Validity: 14 months

Introduction

This product is suitable for rapid extraction of DNA from tissue, cells, blood, saliva, swabs, blood spots, semen and other clinical samples. DNA can be used directly for PCR, quantitative PCR, Southern Blot, test of virus DNA and so on.

Details

Specifications

Features	Specifications
Main Functions	Isolation total DNA from blood, buffy coat, tissue and other samples
Applications	Second generation sequencing, PCR, real time PCR, etc.
Purification method	Polydisperse magnetic beads
Purification technology	Magnetic beads technology
Process method	Manual or automatic
Sample type	Anticoagulant blood, concentrated blood, buffy coat, lymphocytes and cultured cells
Sample amount	Whole blood :< 200μl; Saliva / swab:< 400μl; Tissue :< 20mg
Yield	0.1 – 50μg
Elution volume
Time per run

Principle

This product is based on the purification method of high binding magnetic particles. The sample is lysed and digested under the action of lysate and protease. DNA is released into the lysate. After adding magnetic particles and binding solution, DNA will be adsorbed on the surface of magnetic particles, and impurities such as proteins will be removed without adsorption. The adsorbed particles were washed with washing solution to remove proteins and impurities, washed with ethanol to remove salts, and finally DNA was eluted by Elution Buffer.

Advantages

• High purity – OD 260 / 280 : 1.7- 1.9, OD 260 / 230 : 1.5 – 2.0
• Economy – less than 50% of the price of Qiagen and other imported products
• High yield – most optimal process, ensuring the recovery up to 90%
• Strong processing ability – samples including animal blood, cultured cells, animal tissues, etc.

Kit Contents

Contents	IVD3102
Purification Times	200
MagPure Particles	5 ml
Proteinase K	100 mg
Protease Dissolve Buffer	10 ml
Rnase A	40 mg
Buffer ATL	60 ml
Buffer AL	60 ml
Buffer BD*	20 ml
Buffer BW1*	110 ml
Elution Buffer	30 ml

Cat.No	Reagent	IVD3102-F-96
Proteinase K		50 mg
Protease Dissolve Buffer		6 ml
RNase A		20 mg
Buffer ATL		30 ml
Buffer AL		30 ml
96-Tip		1
Sample plate (DW Plate)	450µl Buffer BD(Ethanol Added)	1
Wash 1 Plate (DW Plate)	600µl Buffer BW1(Ethanol Added)	1
Wash 2 Plate (DW Plate)	600µl Buffer BW1(Ethanol Added)	1
Wash 3 Plate (DW Plate)	750µl Buffer GW2, 20µl MagPure Particle	1
Elution plate (DW Plate)	80µl Elution Buffer	1

Cat.No	Reagent	IVD3102-TL-06
Proteinase K		50 mg
RNase A		20 mg
Protease Dissolve Buffer		6 ml
Buffer ATL		40 ml
Buffer AL		40 ml
AS-Tip		12
2.0ml V-bottom plate	Row 1/7：450µl Buffer BDRow 2/8：450µl Buffer BW1Row 3/9：450µl Buffer BW1Row 4/10：20μl Magpure Particle450μl Wash Buffer GW2 Row 5/11：450μl Wash Buffer GW2 Row 6/12：80µl Elution Buffer	6

Storage and Stability

Proteinase K, RNase A, MagPure Particles should be stored at 2-8°C upon arrival. However, short-term storage (up to 24 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.

Experiment Data

This product is suitable for rapid extraction of DNA from tissue, cells, blood, saliva, swabs, blood spots, semen and other clinical samples. DNA can be used directly for PCR, quantitative PCR, Southern Blot, test of virus DNA and so on.