K-LMALAF

SKU: 700004312

245.5 mL of prepared reagent (e.g. 1116 assays of 0.22 mL)

The L-Malic Acid (Analyser Format) test kit is an analyser format for the specific measurement and analysis of L-malic acid (L-malate) in beverages and food products. On calibration, the prepared reagent is linear to > 80 micrograms of L-malic acid per mL of assay solution.

View more assay kits on our organic acid list.

Advantages

• Extended cofactors stability. Dissolved cofactors stable for > 1 year at 4^oC.
• PVP incorporated to prevent tannin inhibition 
• Very stable reagent when prepared for auto-analyser applications 
• Linear calibration (R² ~ 0.9994) up to 80 μg/mL of L-malic acid in final reaction solution 
• Validated by the University of Wine, Suze la Rousse, France 
• Very competitive price (cost per mL of reagent) 
• Both enzymes supplied as stable suspensions 
• Very rapid reaction (~ 3 min)

The L-Malic Acid (Analyser Format) test kit is an analyser format for the specific measurement and analysis of L-malic acid (L-malate) in beverages and food products. On calibration, the prepared reagent is linear to > 80 micrograms of L-malic acid per mL of assay solution.

Overview

• Collect from nasal, buccal, saliva, fecal, skin, surfaces, and more
• Completely stabilize microbiota profiles from the point-of-collection
• Minimize bias in data analysis: NGS (Metagenomics/Microbiome), PCR and microarrays
• No need to immediately process samples: ship and store at ambient temperatures
• DNA preservation at room temperature over 2 years
• Renders sample non-infectious for safe and easy shipping
• Compatible with DNA isolation kits and protocols: Optimized isolation procedure using Norgen’s Microbiome DNA Isolation Kit

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).

Details

Supporting Data

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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.

Description 

The ExcelRT™ Reverse Transcriptase is a recombinant Moloney Murine Leukemia Virus (M-MLV) reverse transcriptase – an RNA dependent DNA polymerase capable of generating first strand cDNA using an RNA template. It is designed to reduce RNase H activity and create better thermal stability. The ExcelRT™ Reverse Transcriptase is able to routinely synthesize first strand cDNA >8 kb at 37~50°C.

Features

• High yield
• Thermostable, up to 50°C, during first strand synthesis
• High processivity, generating cDNA up to 8 kb
• Reduced RNase H ribonuclease activity

Application

• Generation of first strand cDNA from total RNA or mRNA.
• Suitable for generating cDNA from RNA with strong secondary structure which can be reduced at temperature up to 50°C.

Storage

-20°C for 24 months

High yield

Thermostable, up to 50°C, during first strand synthesis

High sensitivity

Contents

Storage Buffer

20 mM Tris-HCl (pH 7.5), 200 mM NaCl, 0.1 mM EDTA, 1 mM DTT, stabilizer, 50% (v/v) glycerol 

5X RT buffer

250 mM Tris-HCl (pH 8.3 at 25°C), 375 mM KCl and 15 mM MgCl₂

Storage

-20°C for 24 months

The ExcelRT™ Reverse Transcriptase is a recombinant Moloney Murine Leukemia Virus (M-MLV) reverse transcriptase – an RNA dependent DNA polymerase capable of generating first strand cDNA using an RNA template. It is designed to reduce RNase H activity and create better thermal stability. The ExcelRT™ Reverse Transcriptase is able to routinely synthesize first strand cDNA >8 kb at 37~50°C.

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

Propargyl-PEG9-amine has a propargyl group and an amine group. The amine group reacts with carboxylic acids, activated NHS esters, carbonyls (ketone, aldehyde) to form amide bonds. The propargyl group reacts with azides to form triazole linkage with the presence of copper as a catalyst. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.

Propargyl-PEG9-amine has a propargyl group and an amine group. The amine group reacts with carboxylic acids, activated NHS esters, carbonyls (ketone, aldehyde) to form amide bonds. The propargyl group reacts with azides to form triazole linkage with the presence of copper as a catalyst. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.

DNA Concentrator (Magnetic Beads)

The DNA Concentrator (Magnetic Beads) can be used to efficiently concentrate DNA/RNA from various samples with low concentration without the need of a DNA vacuum concentrator. Solid Phase Reversible Immobilization (SPRI) magnetic beads are well used for DNA and RNA purification and concentration. The beads are paramagnetic particles coated with carboxyl groups that reversibly bind to DNA and RNA.

The concentrator protocol is simple: mix Concentrator Buffer and Concentrator Beads with the sample, wash, and elute pure DNA in a small volume to concentrate the DNA samples. Moreover, the DNA/RNA samples are also purified during the procedure. The beads with our unique technology purify DNA/RNA samples effectively by removing unwanted components such as dNTPs, enzymes, detergents, proteins, and other contaminants.

However, traditional magnetic beads can only bind nucleic acids that are 100 bp or longer. Nucleic acids shorter than 100 bp are not effectively recovered. We have successfully developed the kit that overcomes the hurdle of short nucleic acids recovery. The reagent can be used for concentration of samples from genomic DNA to short DNA/RNA.

Recovery rate

• >90% for DNA size >30 bp
• >80% for DNA size between 20-29 bp

Features

• Effective concentrator of DNA and RNA samples, even small DNA, RNA, oligos
• Binding capacity: 10 ug DNA per prep
• Removal of unwanted components and other impurities

The DNA Concentrator (Magnetic Beads) can be used to efficiently concentrate DNA/RNA from various samples with low concentration without the need of a DNA vacuum concentrator. Solid Phase Reversible Immobilization (SPRI) magnetic beads are well used for DNA and RNA purification and concentration. The beads are paramagnetic particles coated with carboxyl groups that reversibly bind to DNA and RNA.