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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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K-LMAL-116A
SKU: 700004311
| Content: | (K-LMAL-58A) 58 assays (manual) / 580 assays (microplate) (K-LMAL-116A) 116 assays (manual) / 1160 assays (microplate) |
| Shipping Temperature: | Ambient |
| Storage Temperature: | Short term stability: 2-8oC, Long term stability: See individual component labels |
| Stability: | > 2 years under recommended storage conditions |
| Analyte: | L-Malic Acid |
| Assay Format: | Spectrophotometer, Microplate |
| Detection Method: | Absorbance |
| Wavelength (nm): | 340 |
| Signal Response: | Increase |
| Linear Range: | 0.5 to 30 µg of L-malic acid per assay |
| Limit of Detection: | 0.25 mg/L |
| Reaction Time (min): | ~ 3 min |
| Application examples: | Wine, beer, fruit juices, soft drinks, candies, fruit and vegetables, bread, cosmetics, pharmaceuticals and other materials (e.g. biological cultures, samples, etc.). |
| Method recognition: | Methods based on this principle have been accepted by AOAC, EEC, EN, NF, NEN, DIN, GOST, OIV, IFU, AIJN, NBN, ISO and MEBAK |
The K-LMAL-58A pack size has been discontinued (read more)
L-Malic Acid (Regular) Assay Kit, for the specific assay of L-malic acid (L-malate) in beverages and food products.
Note for Content: The number of manual tests per kit can be doubled if all volumes are halved. This can be readily accommodated using the MegaQuantTM Wave Spectrophotometer (D-MQWAVE).
Need other assay kits? View our full list of organic acid assay kits.
Advantages
The Flex caddy allows the Temperature Module GEN2 to be installed on the Opentrons Flex deck and sit below the deck, enabling below-deck cable routing and labware placed on top of modules to remain closer to the deck surface. The calibration adapter is used to calibrate the location of the Temperature Module. Caddies and calibration adapters are specific to the type of module.
Note: This item does not include the Temperature Module. The module is available with or without the Flex Caddy and Calibration tool: Temperature Module GEN2
The Flex caddy allows the Temperature Module GEN2 to be installed on the Opentrons Flex deck and sit below the deck, enabling below-deck cable routing and labware placed on top of modules to remain closer to the deck surface. The calibration adapter is used to calibrate the location of the Temperature Module. Caddies and calibration adapters are specific to the type of module.
Note: This item does not include the Temperature Module. The module is available with or without the Flex Caddy and Calibration tool: Temperature Module GEN2