DBCO-C5-acid is an analog of DBCO-Acid with an extended 5-carbon atom spacer arm. The extended 6-carbon atom spacer arm improves its derivatization efficiency and the stability of the yielded conjugates. This spacer arm also improves solubility in organic solvents such as dichloromethane, chloroform, THF, and ethyl acetate. DBCO is commonly used for copper-free Click Chemistry reactions. Reagent grade, for research use only.
DBCO-C5-acid is an analog of DBCO-Acid with an extended 5-carbon atom spacer arm. The extended 6-carbon atom spacer arm improves its derivatization efficiency and the stability of the yielded conjugates. This spacer arm also improves solubility in organic solvents such as dichloromethane, chloroform, THF, and ethyl acetate. DBCO is commonly used for copper-free Click Chemistry reactions. Reagent grade, for research use only.
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Library size selection is an enrichment of a specific range of library sizes for NGS library preparations. 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, or SPRI (Solid Phase Reversible Immobilization) beads, is well used for the purification of DNA due to their reversible DNA binding. The NGS library can be size-selected by the magnetic beads or SPRI beads. The properties of the magnetic beads can be changed for a specific range of DNA binding. The contaminants and other unwanted components in the libraries can also be removed during size selection.
Specific ranges of NGS libraries can be selected using magnetic beads with different buffer compositions. The first DNA-beads binding step, also called the right-side clean-up, removes large NGS library fragments. The large NGS library fragments that bind to the beads are discarded with the beads pellet. The desired NGS library fragments in the supernatant are transferred to a new well, and new beads are added to the supernatant for the second beads-DNA binding, also called the left-side clean-up. After the rinsing step, the NGS library fragments with the dual selection are eluted in water or an appropriate buffer. The magnetic beads method has great advantages over time-consuming column purification and tedious gel-based purification.
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Library size selection for long-read sequencing only requires a single clean-up. In this case, only the large library fragments are bound to the beads, while other small library fragments are discarded with the supernatant. The selected larger library fragments are eluted in water or an appropriate buffer after the rinsing step.
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This kit provides a rapid spin column procedure for the purification and clean-up of sequencing and various other enzymatic reactions including restriction enzyme digests, Klenow reactions, alkaline phosphatase reactions, and ligations. The kit is used to remove reaction contaminants including dye terminators, salts, enzymes, excess primers and primer dimers. Contaminants are undesirable as they can interfere with many downstream applications including sequencing, RFLP, restriction enzyme digestions and ligation. Purification is based on spin-column chromatography without the use of phenol, chloroform or alcohol precipitation. The kit provides a high quality product with up to 90% recovery.
The kit is also available in a 96-well format for high-throughput sequencing reaction clean-up. Purification with the 96-well plate can be performed using either a vacuum manifold or centrifugation.
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| Kit Specifications – 96-well | |
| Binding Capacity Per Well | 15 μg |
| Maximum Loading Volume Per Well | 500 μL |
| Average DNA Recovery | Up to 90% |
| Time to Complete 96 Purifications | 20 minutes |
| Minimum Elution Volume | 50 μL |
Storage Conditions and Product Stability
All solutions should be kept tightly sealed and stored at room temperature. This kit is stable for 1 year after the date of shipment.
| Component | Cat. 34500 (50 preps) | Cat. 34400 (2 x 96-well plate) |
|---|---|---|
| Binding Buffer C | 30 mL | 3 x 30 mL |
| Wash Solution A | 12 mL | 2 x 20 mL |
| Elution Buffer B | 8 mL | 2 x 15 mL |
| Spin Columns | 50 | – |
| Collection Tubes | 50 | – |
| Elution Tubes (1.7 mL) | 50 | – |
| 96-Well Plate | – | 2 |
| Adhesive Tape | – | 4 |
| 96-Well Collection Plate | – | 2 |
| 96-Well Elution Plate | – | 2 |
| Product Insert | 1 | 1 |
Norgen’s Swab Collection and DNA Preservation System is designed for collection, ambient storage and transport of DNA from samples collected using a swab, including nasal, buccal, saliva, fecal, skin, surfaces, etc. The Swab Collection and DNA Preservation System contains Norgen’s Swab Preservative in a liquid format. The user simply collects the specimen using the provided swab, and then transfers the swab into the Swab Preservative. The Swab Preservative prevents the growth of Gram-negative and Gram-positive bacteria and fungi, and also inactivates viruses allowing the resulting non-infectious samples to be handled and shipped safely. In addition, the Swab Preservative eliminates the need to immediately process or freeze samples and allows the samples to be shipped to centralized testing facilities at ambient temperatures. The components of the Swab Preservative allow DNA samples to be stored at room temperature for over 2 years.
DNA Isolation from Preservative
Swab samples collected and preserved using Norgen’s Swab Collection and DNA Preservation System are compatible with most DNA isolation methods. Samples stored in the tubes have been used successfully with most of Norgen Biotek’s DNA isolation kits and reagents. An optimized isolation procedure is available as part of Norgen’s Microbiome DNA Isolation Kit (Cat. 64100).
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| Kit Specifications | |
| Volume of Preservative | 1.2 mL |
| Preservation Temperature | Room Temperature |
| Preservation time | 2 years at room temperature |
Shelf Life and Handling
When stored at room temperature, unused Norgen Swab Preservative Tubes are stable through to the collect-before date without any reduction in performance. Please see the device insert or tube label for collect-before date.
| Kit Components | Cat. 45690 (50 units) |
|---|---|
| Swab Collection and DNA Preservation Kit | 50 |
| Individually Wrapped Swabs | 50 |
| Product Insert | 1 |
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