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E.Z.N.A.® Gel Extraction Kit
Table of Contents
Introduction....................................................................................2
Illustrated Protocol........................................................................3
Kit Contents/Storage and Stability.........................................4
Preparing Reagents......................................................................5
Guideline for Vacuum Manifold..............................................6
Spin Protocol...................................................................................7
Vacuum Protocol.........................................................................10
Enzymatic Reaction Protocol.................................................13
Troubleshooting Guide............................................................15
Ordering.........................................................................................16
Manual Revision: August 2012
Innovations in nucleic acid isolation
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Introduction
The E.Z.N.A.® 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 HiBind® matrix that specifically, but reversibly, binds DNA or RNA under optimized conditions allowing proteins and other contaminants to be removed. Nucleic acids are easily eluted with deionized water or a low salt buffer.
Gel purification of DNA is a common technique for the isolation of specific fragments from reaction mixtures. However, most methods either fail to compley remove agarose or shear DNA which can lead to problems in downstream manipulations. The E.Z.N.A.® Gel Extraction Kit uses proprietary chemistry and HiBind® technology to recover DNA fragments between 70 bp and 20 kb with yields exceeding 85%. The DNA band of interest is excised from the gel, dissolved in Binding Buffer, and transferred to a HiBind® DNA Mini Column. Following three rapid wash steps, DNA is eluted with the Elution Buffer and is ready for other applications. DNA is suitable for ligations, PCR, sequencing, restriction digestion, or various labeling reactions. In addition, this kit can be also used to recover DNA directly from enzymatic reactions such as PCR and enzyme digestion reactions.
Benefits of the E.Z.N.A.® Gel Extraction Kit
• Fast - DNA recovery from agarose gel < 10 minutes
• Reliability - Optimized buffers that guarantee pure DNA
• Safety - No organic extractions
• Quality - Purified DNA is suitable for most applications
Q-spin columns vs. V-spin columns
The E.Z.N.A.® Gel Extraction Kit is available with two different types of columns. V-spin columns have an attached cap, while Q-spin columns are capless. The columns are otherwise identical in use and application. Either column can be used with either the vacuum or centrifugation protocols. D2500 is the V-spin version of the Gel Extraction Kit, while D2501 is the Q-spin version.
Binding Capacity
Each HiBind® DNA Mini Column can bind ~25 μg DNA.
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Vacuum/Spin Protocol
Spin Protocol
Excise DNA Band
from Gel
Incubate and Melt Gel
with Binding Buffer
Troy Built Scalpel
Troy Built Scalpel
Transfer Lysate & Bind
Wash 3x
Dry
Elute
Transfer Lysate & Bind
Wash 3x
Dry
Elute
Excise DNA Band
from Gel
Incubate and Melt Gel
with Binding Buffer
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Kit Contents and Storage
Product
D2500-00
D2501-00
D2500-01
D2501-01
D2500-02
D2501-02
Purifications
5
50
200
HiBind® DNA Mini Columns
5
50
200
2 mL Collection Tubes
5
50
200
Binding Buffer (XP2)
5 mL
40 mL
150 mL
Elution Buffer
1.5 mL
10 mL
20 mL
SPW Wash Buffer
5 mL
25 mL
3 x 25 mL
User Manual
P
P
P
Storage and Stability
All E.Z.N.A.® Gel Extraction Kit components are guaranteed for at least 12 months from the date of purchase when stored at room temperature. Please ensure that the bottle of Binding Buffer (XP2) is tightly capped when not in use. If any precipitates form in the buffers, warm at 37°C to dissolve.
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Dilute SPW Wash Buffer with * ethanol as follows and store at room temperature.
Kit
* Ethanol to be Added
D2500-00
D2501-00
20 mL
D2500-01
D2501-01
100 mL
D2500-02
D2501-02
100 mL per bottle
Preparing Reagents
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Guideline for Vacuum Manifold
The following is required for use with the Vacuum/Spin Protocol:
A) Vacuum Manifold (We recommend Omega Bio-tek’s VAC-08)
Other Compatible Vacuum Manifolds: Qiagen QIAvac24, AldrichVM20, Promega Vacman®, or manifold with standard Luer connector
B) Vacuum Flask
C) Vacuum Tubing
D) Vacuum Source (review tables below for pressure settings)
A) Vacuum Manifold
C) Vacuum Tubing
B) Vacuum Flask
D) Vacuum Source
Manifold
Recommended Pressure (mbar)
VAC-08
-200 to -600
Conversion from millibars:
Multiply by:
Millimeters of mercury (mm Hg)
0.75
Kilopascals (kPa)
0.1
Inches of mercury (inch Hg)
0.0295
Torrs (Torr)
0.75
Atmospheres (atmos)
0.000987
Pounds per Square Inch (psi)
0.0145
Illustrated Vacuum Setup:
Omega Bio-tek’s VAC-08
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E.Z.N.A.® Gel Extraction Kit - Spin Protocol
E.Z.N.A.® Gel Extraction Kit - Spin Protocol
Materials and Equipment to be Supplied by User:
• Heat block or water bath capable of 60°C
• Microcentrifuge capable of at least 13,000 x g
• Vortexer
• Nuclease-free 1.5 mL microcentrifuge tubes
• * ethanol
• Optional: 5M Sodium Acetate, pH 5.2
• Optional: Sterile deionized water
Before starting:
• Prepare SPW Wash Buffer according to the “Preparing Reagents” section on Page 5
• Set heating block or water bath to 60°C
Note: The yellow color of the Binding Buffer (XP2) signifies a pH of ≤ 7.5.
1. Perform agarose gel/ethidium bromide electrophoresis to fractionate DNA fragments. Any type or grade of agarose may be used. However, it is strongly recommended that fresh TAE buffer or TBE buffer be used as running buffer. Do not reuse running buffer as its pH will increase and reduce yields.
2. When adequate separation of bands has occurred, carefully excise the DNA fragment of interest using a wide, clean, sharp scalpel. Minimize the size of the gel slice by removing extra agarose.
3. Determine the appropriate volume of the gel slice by weighing it in a clean 1.5 mL microcentrifuge tube. Assuming a density of 1 g/mL, the volume of gel is derived as follows: a gel slice of mass 0.3 g will have a volume of 0.3 mL.
4. Add 1 volume Binding Buffer (XP2).
5. Incubate at 60°C for 7 minutes or until the gel has compley melted. Vortex or shake the tube every 2-3 minutes.
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Important: Monitor the pH of the Gel/Binding Buffer mixture after the gel has compley dissolved. DNA yields will significantly decrease when the pH > 8.0. If the color of the mixture becomes orange or red, add 5 μL 5M sodium acetate (pH 5.2) to bring the pH down. After this adjustment, the color of the Gel/Binding Buffer mixture should be light yellow.
6. Insert a HiBind® DNA Mini Column in a 2 mL Collection Tube.
7. Add no more than 700 μL DNA/agarose solution from Step 5 to the HiBind® DNA Mini Column.
8. Centrifuge at 10,000 x g for 1 minute at room temperature.
9. Discard the filtrate and reuse collection tube.
10. Repeat Steps 7-9 until all of the sample has been transferred to the column.
11. Add 300 μL Binding Buffer (XP2).
12. Centrifuge at maximum speed (≥13,000 x g) for 1 minute at room temperature.
13. Discard the filtrate and reuse collection tube.
14. Add 700 μL SPW Wash Buffer.
Note: SPW Wash Buffer must be diluted with * ethanol prior to use. Please see Page 5 for instructions.
15. Centrifuge at maximum speed for 1 minute at room temperature.
16. Discard the filtrate and reuse collection tube.
E.Z.N.A.® Gel Extraction Kit - Spin Protocol
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Optional: Repeat Steps 14-16 for a second SPW Wash Buffer wash step. Perform the second wash step for any salt sensitive downstream applications.
17. Centrifuge the empty HiBind® DNA Mini Column for 2 minutes at maximum speed to dry the column matrix.
Note: It is important to dry the HiBind® DNA Mini Column matrix before elution. Residual ethanol may interfere with downstream applications.
18. Transfer the HiBind® DNA Mini Column to a clean 1.5 mL microcentrifuge tube.
19. Add 30-50 μL Elution Buffer or deionized water directly to the center of the column membrane.
Note: The efficiency of eluting DNA from the HiBind® DNA Mini Column is dependent on pH. If eluting DNA with deionized water, make sure that the pH is around 8.5.
20. Let sit at room temperature for 2 minutes.
21. Centrifuge at maximum speed for 1 minute.
Note: This represents approximay 70% of bound DNA. An optional second elution will yield any residual DNA, though at a lower concentration.
22. Store DNA at -20°C.
E.Z.N.A.® Gel Extraction Kit - Spin Protocol
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E.Z.N.A.® Gel Extraction Kit - Vacuum Protocol
Materials and Equipment to be Supplied by User:
• Vacuum Manifold (See Page 6)
• Heat block or water bath capable of 60°C
• Microcentrifuge capable of at least 13,000 x g
• Vortexer
• Nuclease-free 1.5 mL microcentrifuge tubes
• * ethanol
• Optional: 5M Sodium Acetate, pH 5.2
• Optional: Sterile deionized water
Before starting:
• Prepare the Vacuum Manifold (See Page 6)
• Prepare SPW Wash Buffer according to the “Preparing Reagents” section on Page 5
• Set heating block or water bath to 60°C
Note: The yellow color of the Binding Buffer (XP2) signifies a pH of ≤ 7.5.
1. Perform agarose gel/ethidium bromide electrophoresis to fractionate DNA fragments. Any type or grade of agarose may be used. However, it is strongly recommended that fresh TAE buffer or TBE buffer be used as running buffer. Do not reuse running buffer as its pH will increase and reduce yields.
2. When adequate separation of bands has occurred, carefully excise the DNA fragment of interest using a wide, clean, sharp scalpel. Minimize the size of the gel slice by removing extra agarose.
3. Determine the appropriate volume of the gel slice by weighing it in a clean 1.5 mL microcentrifuge tube. Assuming a density of 1 g/mL, the volume of gel is derived as follows: a gel slice of mass 0.3 g will have a volume of 0.3 mL.
4. Add 1 volume Binding Buffer (XP2).
E.Z.N.A.® Gel Extraction Kit - Vacuum Protocol
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5. Incubate at 60°C for 7 minutes or until the gel has compley melted. Vortex or shake the tube every 2-3 minutes.
6. Prepare the vacuum manifold according to manufacturer’s instructions.
7. Connect the HiBind® DNA Mini Column to the vacuum manifold.
8. Add no more than 700 μL DNA/agarose solution from Step 5 to the HiBind® DNA Mini Column.
9. Turn on the vacuum source to draw the sample through the column.
10. Turn off the vacuum.
11. Repeat Steps 8-10 until all of the sample has been transferred to the column.
12. Add 300 μL Binding Buffer (XP2).
13. Turn on the vacuum source to draw the sample through the column.
14. Turn off the vacuum.
15. Add 700 μL SPW Wash Buffer.
Note: SPW Wash Buffer must be diluted with * ethanol prior to use. Please see Page 5 for instructions.
16. Turn on the vacuum source to draw the sample through the column.
17. Turn off the vacuum.
E.Z.N.A.® Gel Extraction Kit - Vacuum Protocol
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Optional: Repeat Steps 15-17 for a second SPW Wash Buffer wash step. Perform the second wash step for any salt sensitive downstream applications.
18. Transfer the HiBind® DNA Mini Column to a clean 1.5 mL microcentrifuge tube.
19. Centrifuge the empty HiBind® DNA Mini Column for 2 minutes at maximum speed to dry the column matrix.
Note: It is important to dry the HiBind® DNA Mini Column matrix before elution. Residual ethanol may interfere with downstream applications.
20. Transfer the HiBind® DNA Mini Column to a clean 1.5 mL microcentrifuge tube.
21. Add 30-50 μL Elution Buffer or deionized water directly to the center of the column membrane.
Note: The efficiency of eluting DNA from the HiBind® DNA Mini Column is dependent on pH. If eluting DNA with deionized water, make sure that the pH is around 8.5.
22. Let sit at room temperature for 2 minutes.
23. Centrifuge at maximum speed for 1 minute.
Note: This represents approximay 70% of bound DNA. An optional second elution will yield any residual DNA, though at a lower concentration.
24. Store DNA at -20°C.
E.Z.N.A.® Gel Extraction Kit - Vacuum Protocol
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E.Z.N.A.® Gel Extraction Kit Protocol - Purification of DNA from Enzymatic Reactions
The following protocol is designed for DNA recovery from enzymatic reactions such as PCR and probe labeling reactions.
Materials and Equipment to be Supplied by User:
• Microcentrifuge capable of at least 13,000 x g
• Vortexer
• Nuclease-free 1.5 mL microcentrifuge tubes
• * ethanol
Before starting:
• Prepare SPW Wash Buffer according to the “Preparing Reagents” section on Page 5
Note: The yellow color of the Binding Buffer (XP2) signifies a pH of ≤ 7.5.
1. Determine the volume of the enzymatic reaction.
2. Transfer the sample into a clean 1.5 mL microcentrifuge tube.
3. Add 1 volume Binding Buffer (XP2).
4. Vortex or invert the sample to mix thoroughly.
5. Briefly centrifuge the tube to collect any drops from the inside of the lid.
6. Insert a HiBind® DNA Mini Column into a 2 mL Collection Tube.
7. Transfer the sample to the HiBind® DNA Mini Column.
8. Centrifuge at 10,000 x g for 1 minute at room temperature.
E.Z.N.A.® Gel Extraction Kit - Enzymatic Reaction Protocol
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9. Discard the filtrate and reuse the collection tube.
10. Add 700 μL SPW Wash Buffer.
Note: SPW Wash Buffer must be diluted with * ethanol prior to use. Please see Page 5 for instructions.
11. Centrifuge at maximum speed (≥13,000 x g) for 1 minute at room temperature.
12. Discard the filtrate and reuse collection tube.
13. Repeat Steps 10-12 for a second SPW Wash Buffer wash step.
14. Centrifuge the empty HiBind® DNA Mini Column for 2 minutes at maximum speed to dry the column matrix.
Note: It is important to dry the HiBind® DNA Mini Column matrix before elution. Residual ethanol may interfere with downstream applications.
15. Transfer the HiBind® DNA Mini Column to a clean 1.5 mL microcentrifuge tube.
16. Add 30-50 μL Elution Buffer or deionized water directly to the center of the column membrane.
Note: The efficiency of eluting DNA from the HiBind® DNA Mini Column is dependent on pH. If eluting DNA with deionized water, make sure that the pH is around 8.5.
17. Let sit at room temperature for 2 minutes.
18. Centrifuge at maximum speed for 1 minute.
Note: This represents approximay 70% of bound DNA. An optional second elution will yield any residual DNA, though at a lower concentration.
19. Store DNA at -20°C.
E.Z.N.A.® Gel Extraction Kit - Enzymatic Reaction Protocol
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Troubleshooting Guide
Please use this guide to troubleshoot any problems that may arise. For further assistance, please contact the technical support staff, toll free, at ().
Possible Problems and Suggestions
Low DNA Yields
Too little Binding Buffer (XP2) added to gel
Volume of agarose gel slice determined incorrectly. Add enough Binding Buffer (XP2) as instructed.
Agarose gel does not compley dissolve
Make sure water bath is set to 60°C and allow gel to compley melt. Add more Binding Buffer (XP2) if necessary.
Inappropriate elution buffer
Use Elution Buffer or check the pH of the water used to elute DNA.
TAE/TBE running buffer is not fresh
With overuse, TAE buffer loses its buffering capacity and its pH increases. This raises the pH of the agarose/DNA Binding Buffer solution which interferes with DNA binding to the HiBind® matrix. Adjust pH by adding 5 μL 5M sodium acetate, pH 5.2, to the gel slice. Use freshly prepared TAE buffer for gel purification in order to prevent the contamination of isolated DNA and improve yields.
Column clogged
Agarose gel not compley dissolved in
Binding Buffer (XP2)
Make sure water bath is set to 55-60°C and allow gel to compley melt. For large agarose slices (>0.3 mL), it is recommended that the gel be diced into smaller fragments to aid melting.
No DNA eluted
SPW Wash Buffer not diluted with * ethanol
Prepare SPW Wash Buffer as instructed on page 5 or as indicated on bottle.
Incorrect amount of Binding Buffer added
Measure the gel accuray and use 0.1 mL Binding Buffer (XP2) per 0.1 g gel.
Optical densities do not agree with DNA yield on agarose gel
Trace contaminants eluted from column increase A260
Make sure to wash column as instructed in Step 14 of the spin protocol, and Step 15 of the vacuum protocol. Alternatively, rely on agarose gel/ethidium bromide electrophoresis for quantization.
DNA sample floats out of well while loading agarose gel.
Ethanol not compley removed from column
Centrifuge as instructed in Step 17 of the spin protocol and Step 19 of the vacuum protocol.
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Ordering Information
The following components are available for purchase separay.
(Call Toll Free at 1-)
Product
Part Number
Binding Buffer (200 mL)
PDR040
Binding Buffer (500 mL)
PDR041
SPW Wash Buffer (25 mL)
PDR045
2 mL Collection Tubes
SS1-1370-00
1.5 mL DNase/RNase-free Centrifuge Tubes
SS1-1210-0
HiBind®, E.Z.N.A.®, and MicroElute® are registered trademarks of Omega Bio-tek, Inc.
Qiagen®, QIAvac® and Vacman® are all trademarks of their respective companies.
PCR is a patented process of Hoffman-La . Use of the PCR process requires a license.