Endonucleases DNA-specific, dsDNase
Double-Strand Specific dsDNase (dsDNase) is ideal for fast and effective removal of contaminating DNA from PCR master mixes.
Taq polymerases are commonly contaminated by bacterial DNA. This is a problem in PCR based bacterial typing and detection as it might cause false positive results. The unique properties of dsDNase make it suited for removal of contaminating DNA from PCR master mixes prior to addition of DNA template.
In figure 1, a PCR master mix was treated with different amounts of dsDNase before performing a qPCR to measure the contaminating bacterial DNA in the master mix. ArcticZymes dsDNase effectively removed contaminating DNA below known levels of the assay detection limits.
The dsDNase from Arctic shrimp (Pandalus borealis) is recombinantly produced in Pichia pastoris. It cleaves phosphodiester linkages in DNA to yield oligonucleotides with 5’-phosphate and 3’-hydroxyl termini.
The specific activity is estimated to be 30 times higher than that of bovine DNase I. In the presence of magnesium as only divalent cation and using oligos as a substrate, the activity towards dsDNA is 5000-fold higher than towards ssDNA.
The unique double strand-specificity allows specific degradation of dsDNA while leaving shorter ssDNA as primers and probes essentially intact. Easy inactivation by moderate heat (65°C) allows addition of DNA intended for analysis directly after removal of contaminating DNA.
Figure 1. The dsDNase effectively removes contaminated DNA
The dsDNase effectively removes contaminated DNA:
A PCR master mix was preincubated with various concentrations of dsDNase. After treatment, no DNA was amplified in non-template controls.
Nucleic acid specificity has been tested towards double- and single-stranded DNA and RNA oligonucleotides. The specificity of dsDNase towards the substrate has been measured using 15-mer oligonucleotides with FAM at 5′ and DarkQuencher® 3′ (Eurogentec). The fluorescence is proportional to enzyme activity. Assay conditions: 25 mM Tris pH 7.5, 5 mM MgCl2, and 2 μM oligonucleotide.
Substrate Relative Activity
dsDNA 100%
ssDNA <0.03%
dsRNA <0.01%
ssRNA <0.01%
Double-Strand Specific dsDNase (dsDNase) is ideal for fast and effective removal of contaminating DNA from PCR master mixes.
Taq polymerases are commonly contaminated by bacterial DNA. This is a problem in PCR based bacterial typing and detection as it might cause false positive results. The unique properties of dsDNase make it suited for removal of contaminating DNA from PCR master mixes prior to addition of DNA template.
The Benzoic Acid Detection Kit provides a rapid, simple, sensitive, and reliable test suitable for screening of Benzoic Acid concentration.
Benzoic Acid is a white solid that is an extensively used preservative. Although this preservative prevents or delays nutritional losses due to microbiological, enzymatic or chemical changes of foods during its shelf life there is a suspicion that small amounts of benzene may be formed from benzoic acid in nonalcoholic beverages in the presence of ascorbic acid. Benzoic acid and ascorbic acid are food additives which must be declared on the food. Benzoic acid or E 210 is a preservative which also occurs naturally, for instance, in cranberries. A maximum amount of 150 mg/l benzoic acid may be added to non-alcoholic flavored beverages.
Highly Sensitive Assay to Screen for Benzoic Acid
Visual Readout (sample dependent: milk, red/pink)
Detection range of 1ppm to 1500ppm
Tube or Plate based options available
Compatible with the Nix Sensor or plate readers to obtain quantitative results.
HiPure Plant DNA Mini Kit supplies a simple and rapid extraction of genomic DNA from different plant samples. The kit is based on silica gel column and CTAB lysis purification technology. The whole extraction process is only 30-50 minutes. Purified DNA can be used directly for PCR, SSR, AFLP, RAPD and Southern Blot, etc.
Specifications
| Features | Specifications |
| Main Functions | Isolation total DNA from 150 mg plant and fungal tissue |
| Applications | PCR, SSR, AFLP, RAPD and southern blot, etc. |
| Purification method | Mini spin column |
| Purification technology | Silica technology |
| Process method | Manual (centrifugation or vacuum) |
| Sample type | Fresh / frozen plant samples, dried plant / seed samples |
| Sample amount | Fresh / frozen plant samples: 50-150 mgDried plant / seed samples: 15-40 mg |
| Elution volume | ≥40μl |
| Time per run | 30-50 minutes |
| Liquid carrying volume per column | 800μl |
| Binding yield of column | 100μg |
This product is based on silica column purification. The sample is lysed with CATB Buffer. DNA is released into the lysate. Cell debris, precipitated proteins and polysaccharides are removed by chloroform extraction. After adjust the binding condition, transfer to an adsorption column. DNA is adsorbed on the membrane, while protein is not adsorbed and is removed with filtration. After washing proteins and other impurities, nucleic acid was finally eluted with low-salt buffer (10mm Tris, pH9.0, 0.5mm EDTA).
Kit Contents
| Contents | D318702 | D318703 |
| Purification Times | 50 Preps | 250 Preps |
| Buffer PAL | 60 ml | 200 ml |
| Buffer GWP | 60 ml | 200 ml |
| Buffer DW1 | 30 ml | 150 ml |
| Buffer GW2* | 20 ml | 50 ml |
| Buffer AE | 20 ml | 60 ml |
| HiPure DNA Mini Columns II | 50 | 250 |
| 2 ml Collection Tubes | 50 | 250 |
Storage and Stability
This product can be stored dry at room temperature (15-25°C) and are stable for at least 18 months under these conditions.
| Name | CAT NO | Fresh / frozen tissue amount | Dried tissue amount | Column type | Elution volume | Yield (muscle) |
| HiPure HP Plant DNA Kit | D3187 | 150mg | 40mg | 1.5ml column | 50 – 100μl | 3-70μg |
| HiPure HP Plant DNA Maxi Kit | D3163 | 5g | 1g | 50ml column | 0.7 – 3ml | 75-1250μg |
| HiPure SF Plant DNA Kit | D3164 | 100mg | 20mg | 1.5ml column | 50 – 100μl | 3-50μg |
| HiPure SF Plant DNA 96 Kit | D3167 | 50mg | 15mg | 96 well plate | 75 – 150μl | 3-30μg |
HiPure Plant DNA Mini Kit supplies a simple and rapid extraction of genomic DNA from different plant samples. The kit is based on silica gel column and CTAB lysis purification technology. The whole extraction process is only 30-50 minutes. Purified DNA can be used directly for PCR, SSR, AFLP, RAPD and Southern Blot, etc.