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The EZgene family of products is an innovative system that radically simplifies the extraction and purification of nucleic acids from a variety of sources. The key to this system is the new ezBind matrix that specifically, but reversibly, binds DNA or RNA under certain optimal conditions allowing proteins and other contaminants to be removed. Nucleic acids are easily eluted with deionized water or a low salt buffer.
The EZgene Tissue DNA Kit provides an easy and rapid method for the isolation of genomic DNA for consistent PCR and Southern analysis. Up to 30 mg of animal tissue, culture cells, mouse tail snips and paraffin-embedded tissue can be readily processed at a time. This kit allows for the single or multiple simultaneous processing of samples. There is no need for phenol/chloroform extractions, and time-consuming steps are eliminated (e.g. precipitation using isopropanol or ethanol). Purified DNA can be directly used for most applications such as PCR, Southern Blotting, and Restriction Enzyme Digestion.
All EZgene Tissue DNA Kit components are guaranteed for at least 12 months from the date of purchase when stored as follows: reconstituted Proteinase K -20°C, and all other materials at RT (22-25°C).
Each ezBind DNA mini column can bind approximately 100 µg DNA. Using greater than 30 mg tissue or 1x107 cells is not recommended
Materials and Reagents to be supplied by user
Tabletop microcentrifuge.
Sterile 1.5 mL centrifuge tubes.
Shaking water-bath set to 55°C for Tissue Protocol; 65°C for Cultured Cells; 55°C for Mouse Tail.
RNase Stock Solution (100 mg/mL) (OPTIONAL).
Absolute Ethanol (96-100%).
PBS Buffer.
Determination of Yield and Quality
The total DNA yield can be determined by a spectrophotometer using deionized water, Tris-HCl Buffer, or Elution Buffer as a blank. DNA concentration is calculated as:
[DNA] = (Absorbance260) x (0.05 µg/µL) x (Dilution Factor)
The quality of DNA can be assessed by measuring absorbance at both 260 nm and 280 nm. An A260/A280 ratio of 1.7-1.9 corresponds to 85%-95% purity.
Expected yields vary with both amount and type of tissue used.
Typically, 30 mg of fresh tissue will yield 10~40 µg of DNA with two elutions (each 200 µL).
Concentrate DNA
If necessary, the DNA can be concentrated as follows. Add sodium chloride to reach a final concentration of 0.1M followed by 2 x volume of absolute (96-100%) ethanol. Mix well and incubate at -20°C for 10 min. Centrifuge at 10,000 x g for 15 min and discard supernatant. Add 700 μL of 70% ethanol and centrifuge at 10,000 x g for 2 min.
Discard supernatant, air dry the pellet for 2 min, and resuspend the DNA in 20 μL of sterile deionized water or 10 mM Tris-HCl, pH 8.5.
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