Propargyl-PEG5-Ms represents a bifunctional linker possessing a proparygyl group reactive towards azides in copper (I) click chemistry to form stable triazoles with the target compound as well as a mesyl group which is a good leaving group for nucleophilic reactions.
Propargyl-PEG5-Ms represents a bifunctional linker possessing a proparygyl group reactive towards azides in copper (I) click chemistry to form stable triazoles with the target compound as well as a mesyl group which is a good leaving group for nucleophilic reactions.
Description
The ExcelTaq™ 2X Fast Q-PCR Master Mix (SYBR, no ROX) is a ready-to-use reagent with all the essential components for quantitative real-time PCR (qPCR) except primers and templates. The master mix contains a highly stable hot-start Taq polymerase in an optimized buffer with dsDNA specific SYBR green fluorescent dye. Consequently, the ExcelTaq™ 2X Fast Q-PCR Master Mix (SYBR, no ROX) features high stability during storage, even at 37°C for weeks. In addition to high sensitivity and signal intensity, the ExcelTaq™ 2X Fast Q-PCR Master Mix (SYBR, no ROX) performs a low background/ high specificity qPCR results, as well as a better compatibility with fast PCR program.
With inert smart blue contrast dye, the ExcelTaq™ 2X Fast Q-PCR Master Mix (SYBR, no ROX) is ready-to-use and greatly reduces pipetting errors, while largely improving the reproducibility of the process. The ExcelTaq™ 2X Fast Q-PCR Master Mix (SYBR, no ROX) is also compatible with ROX reference dye if ROX is recommended by the manufacturer of the qPCR system. This master mix allows sensitive, precise amplification, real-time tracking of the amplification process, and simultaneous quantification for targeted DNA molecules.
Features
Storage
Protect from light.
Aliquot to avoid multiple freeze-thaw cycles.
-20°C for 12 months
The ExcelTaq™ 2X Fast Q-PCR Master Mix (SYBR, no ROX) is a ready-to-use reagent with all the essential components for quantitative real-time PCR (qPCR) except primers and templates. The master mix contains a highly stable hot-start Taq polymerase in an optimized buffer with dsDNA specific SYBR green fluorescent dye. Consequently, the ExcelTaq™ 2X Fast Q-PCR Master Mix (SYBR, no ROX) features high stability during storage, even at 37°C for weeks. In addition to high sensitivity and signal intensity, the ExcelTaq™ 2X Fast Q-PCR Master Mix (SYBR, no ROX) performs a low background/ high specificity qPCR results, as well as a better compatibility with fast PCR program.
With inert smart blue contrast dye, the ExcelTaq™ 2X Fast Q-PCR Master Mix (SYBR, no ROX) is ready-to-use and greatly reduces pipetting errors, while largely improving the reproducibility of the process. The ExcelTaq™ 2X Fast Q-PCR Master Mix (SYBR, no ROX) is also compatible with ROX reference dye if ROX is recommended by the manufacturer of the qPCR system. This master mix allows sensitive, precise amplification, real-time tracking of the amplification process, and simultaneous quantification for targeted DNA molecules.
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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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Salmonella enterica have emerged as significant foodborne pathogens that pose a serious public health problem. The symptoms of salmonellosis may include diarrhea, fever, vomiting, and abdominal cramps with elderly, new-born, and immunocompromised individuals the most susceptible. S. enterica is a facultatively anaerobic Gram-negative bacterium that could survive low temperatures and freezing. The majority of the 1.3 billion annual cases of Salmonella-caused human gastroenteritis result from ingestion of contaminated food products, such as raw or undercooked meat, seafood, and eggs, as well as raw or unpasteurized milk and dairy products. Salmonella infections are also contracted following consumption of fresh fruits or vegetables that have been contaminated by infected fertilizer.
Salmonella enterica TaqMan PCR Kit, 24 reactions
Figure 1 / 3
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Storage Conditions
The Salmonella enterica TaqMan PCR Kit Dx is shipped on dry ice. The components of the kit should be frozen upon arrival. If one or more of the components is not frozen when the kit is received, or if any of the components have been compromised during shipment, please contact Norgen Biotek for assistance. All kit components should be stored at -20°C upon arrival. Repeated thawing and freezing (> 3 x) of the Master Mix and Positive Control should be avoided, as this may affect the performance of the assay. If the reagents are to be used only intermittently, they should be frozen in aliquots.
| Component | Cat. TM32100 (24 rxns) |
|---|---|
| MDx TaqMan 2X PCR Master Mix Dx | 550 µL |
| S. enterica Primer & Probe Mix Dx | 2 x 70 µL |
| S. enterica Positive Control Dx – 200,000 copies/μL | 50 µL |
| Nuclease-Free Water | 2 x 1.25 mL |
| Product Insert | 1 |
