Endotoxin Removal Kits- For DNA
For the rapid removal of endotoxins from previously purified DNA
For research use only and NOT intended for in vitro diagnostics.
Endotoxin Removal Kits- For DNA
For the rapid removal of endotoxins from previously purified DNA
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Overview
- Reduce endotoxin levels to 0.1 EU/µg DNA or less
- Available in 3 formats: Mini, Midi, and Maxi to suit your desired input volume
- Remove endotoxins from up to 1 mg of DNA with the Maxi format kit
- Fast and easy processing using a rapid spin-column format
These kits are designed for the rapid spin column removal of endotoxins from previously purified DNA. Norgen's spin columns bind DNA while endotoxins, salts and other contaminants are washed away. These kits reduce endotoxins to 0.1 EU/μg DNA or less providing plasmid DNA that is immediately ready for transfections or other endotoxin-sensitive applications. Typical recovery of DNA is >90% of the starting sample.
Endotoxin Removal Kit (Mini)
This kit is designed for the rapid spin column removal of endotoxins from up to 25 µg of previously purified DNA. The convenient spin column procedure can be completed in approximately 20 minutes.
Endotoxin Removal Kit (Midi)
This kit is designed for the rapid spin column removal of endotoxins from up to 200 μg of previously purified DNA. The convenient spin column procedure can be completed in approximately 30 minutes.
Endotoxin Removal Kit (Maxi)
This kit is designed for the rapid spin column removal of endotoxins from up to 1 mg of previously purified DNA. The convenient spin column procedure can be completed in approximately 30 minutes.
About Endotoxins
Endotoxins (also called lipopolysaccharides), are cell-membrane components of Gram-negative bacteria such as E. coli. Endotoxins are released during the lysis step of plasmid purification and significantly reduce transfection efficiencies in endotoxin sensitive cell lines. Therefore, the removal of endotoxins from plasmid preparations is often necessary prior to the use of the DNA in such downstream applications.
Details
Supporting Data
Kit Specifications
|
|
Maximum DNA Input
|
25 μg
|
Final Endotoxin Level
|
≤ 0.1 EU/µg DNA
|
Size of DNA Purified
|
Up to 13,000 bp
|
Maximum DNA Volume Input |
100 μL
|
Average Recovery
|
> 90%
|
Time to Complete 10 Purifications |
20 minutes
|
Storage Conditions and Product Stability
All solutions should be kept tightly sealed and stored at room temperature. This kit is stable for 2 years after the date of shipment.
Component | Cat. 22700 (25 preps) | Cat. 52200 (10 preps) | Cat. 21900 (4 preps) |
---|---|---|---|
Buffer SK | 15 mL | 60 mL | 60 mL |
Wash Solution H | 18 mL | 18 mL | 18 mL |
Elution Buffer I | 6 mL | 12 mL | 12 mL |
Endotoxin Removal Solution | 1.5 mL | 1.5 mL | 1.5 mL |
Precipitation Solution | - | 1.5 mL | 1.5 mL |
Spin Columns (assembled with Collection Tubes) | - | 10 | 4 |
Spin Columns | 25 | - | - |
Collection Tubes | 25 | - | - |
Elution Tubes (1.7 mL) | 25 | - | - |
Elution Tubes (15 mL) | - | 10 | - |
Elution Tubes (50 mL) | - | - | 4 |
Product Insert | 1 | 1 | 1 |
Documentation
FAQs
Mini, Midi, Maxi
Poor DNA recovery could be due to one or a combination of the following factors:
- DNA did not bind properly to the column.
Ensure that the Buffer SK does not contain any precipitates. Warm and mix gently if necessary.
- The appropriate amount of ethanol was not added to Wash Solution H.
Wash Solution H has been specifically designed to contain the appropriate amount of components. Ensure that Wash Solution H is prepared using the correct amount of ethanol.
- Incomplete removal of Wash Solution H.
Ensure that the column is spun for specified time minutes after the wash step, in order to completely dry the column. Traces of ethanol may remain in the eluted sample otherwise, and interfere with subsequent enzymatic reactions.
- The appropriate amount of Buffer SK was not added.
Ensure that 5 volumes of Buffer SK is added for every 1 volume of DNA processed. The DNA volume must not exceed the specified volume for each kit.
If the DNA does not perform well in downstream applications, it may be due to one or more of the following:
- DNA was not washed with the provided Wash Solution H.
Ensure that the column is washed with the appropriate amount of Wash Solution H. This solution has been specifically designed to remove all traces of ethanol and endotoxin.
- Proper Elution Buffer was not used.
The provided Elution Buffer I has been optimized for endotoxin-free recoveries. If endotoxin-free water is used for the elution, ensure that the pH is between 7 and 8.
- A different Elution Buffer was used.
The provided Elution Buffer I has been optimized for endotoxin-free recoveries. The endotoxin-free properties of the eluted DNA will be compromised if another elution buffer is used. If a different elution buffer other than the one provided is used, the buffer should also be checked for any components that may interfere with the application. Common components that are known to interfere are high salts (including EDTA), detergents, and other denaturants. Check the compatibility of your elution buffer with the intended use.
Endotoxin levels in the eluted DNA could become slightly higher than 0.1 EU/μg DNA due to the following:
- A different Elution Buffer was used.
The provided Elution Buffer I has been optimized for endotoxin-free recoveries. The endotoxin-free properties of the eluted DNA will be compromised if another elution buffer is used. If a different elution buffer other than the one provided is used, the buffer should also be checked for endotoxin levels.
- The endotoxin levels of the input were extremely high.
If the initial input DNA had extremely high endotoxin levels, the levels may not be completely reduced to 0.1 EU/μg of DNA or less. In this case, the eluted DNA could be applied to a second column and the procedure repeated in order to further reduce the endotoxin levels.
Citations
Title | Precision multidimensional assay for high-throughput microRNA drug discovery |
Citation | Nature Communications 2023. |
Authors | Benjamin Haefliger1 , Laura Prochazka1 , Bartolomeo Angelici1 & Yaakov Benenson |
Title | Rational design and construction of multi-copy biomanufacturing islands in mammalian cells |
Citation | Nucleic Acids Research 2023. |
Authors | Altamura R, Doshi J, Benenson Y. |
Title | Transplantation of prokaryotic two-component signaling pathways into mammalian cells |
Citation | PNAS 2023. |
Authors | J Hansen, E Mailand, KK Swaminathan, J Schreiber, B Angelici, Y Benenson |