PureDireX Genomic DNA Isolation Dual Kit (Column Based)

The DUAL Genomic DNA Isolation Kit (Blood/ Cultured Cell/ Fungus) combines the reagent system and spin column system. The kit is designed specifically for isolating the genomic DNA from the whole blood, frozen blood, buffy coat, cultured animal/ bacterial cells, and fungus. This unique reagent system ensures the total DNA with a high yield and good quality from the samples. The spin column system is designed to purify or concentrate DNA products which have been previously isolated with the reagents. The entire procedure can be completed in 1 hour without the phenol/ chloroform extraction. The purified DNA is suitable for use in PCR or other enzymatic reactions.
 

Sample

Up to 300 μl of the whole blood
Up to 200 μl of the frozen blood
Up to 200 μl of the buffy coat
Cultured animal cells (up to 1 x10^⁷)
Cultured bacterial cells (up to 1 x10^⁹)
Fungus cells (up to 5 x 10^⁷)

Format
Reagent and spin column

Yield
Up to 50 μg

Operation time
Within 60 minutes

Elution volume
50∼200 μl

[PureDireX / PDC02-0100 / Bio-Helix]

▍Fresh Whole Blood or Buffy Coat

Reagent System Protocol

Step 1 - Sample Cells Harvesting
1. Collect blood in the EDTA-Na₂ treated collection tubes (or other anticoagulant mixtures).
2. Transfer up to 300 µl of the blood or 200 µl of buffy coat to a sterile 1.5 ml microcentrifuge tube.
3. Add 900 µl of the Buffer RL and mix by inversion.
4. Incubate the tube at the room temperature for 10 minutes (invert twice during incubation).
5. Centrifuge at 4,000 x g for 5 minutes.
6. Remove the supernatant completely and resuspend the cells in 50 µl of the Buffer RL by pipetting the pellet.

Step 2 - Lysis
1. Add 300 µl of the Buffer CL to the resuspended cells from Step 1 and mix by vortex.
2. Incubate at 60°C for 10 minutes or until the sample lysate is clear. During the incubation, invert the tube every 3 minutes.
Optional Step: RNA Degradation (If RNA-free genomic DNA is required, perform this optional step.)
3. Add 5 µl of RNase A (10 mg/ml) to the sample lysate and mix by vortex. Incubate at room temperature for 5 minutes.

Step 3 - Protein Removal
1. Add 100 µl of the Buffer PO to the sample lysate and vortex immediately for 10 seconds.
2. Incubate on ice for 5 minutes.
3. Centrifuge at 14-16,000 x g for 3 minutes.
4. Transfer the supernatant to a clean 1.5 ml microcentrifuge tube.
Switch Step
◆ If more pure DNA is required, please switch to Column System (DNA Pure) Protocol.

Step 4 - DNA Precipitation
1. Add 300 µl of Isopropanol to the sample from the Step 3 and mix well by inverting 20 times.
2. Centrifuge at 14-16,000 x g for 5 minutes.
3. Discard the supernatant and add 300 µl of 70% ethanol to wash the pellet.
4. Centrifuge at 14-16,000 x g for 3 minutes.
5. Discard the supernatant and air-dry the pellet for 10 minutes.

Step 5 DNA Rehydration
1. Add 50-100 µl of the Buffer E and incubate at 60°C for 5-10 minutes to dissolve the DNA pellet. During the incubation, tap the bottom of the tube to promote DNA rehydration.

 

Column System (DNA Pure) Protocol
* Add 60ml of the absolute ethanol to the Buffer W2 prior to initial use.
* Pre-heat the Buffer E to 60°C prior to use.
Step 1 - Sample Preparation
1. Add 400 µl of the Buffer BD to the sample from Step 3 Protein Removal and shake vigorously.

Step 2 - DNA Binding
1. Place a DG Column in a 2 ml Collection Tube.
2. Transfer the sample mixture from the previous step to the DG Column.
3. Centrifuge at 14-16,000 x g for 30 seconds.
4. Discard the flow-through and place the DG Column back in the same Collection Tube.

Step 3 - Wash
1. Add 400 µl of the Buffer W1 into the DG Column.
2. Centrifuge at 14,000 x g for 30 seconds.
3. Discard the flow-through and place the DG Column back into the same Collection tube.
4. Add 600 µl of the Buffer W2 (Ethanol added) into the DG Column.
5. Centrifuge at 14,000 x g for 30 seconds.
6. Discard the flow-through and place the DG Column back into the same Collection tube.
7. Centrifuge at 14,000 x g again for 2 minutes to remove residual Buffer W2.

Step 4 - DNA Elution
1. Place the dried DG column in a clean 1.5 ml microcentrifuge tube.
2. Add 50-200 µl of Pre-Heated Buffer E or TE (not provided) into the center of the column matrix.
3. Let it stand at 60°C for 5 minutes.
4. Centrifuge for 2 minutes at 14-16,000 x g to elute the purified DNA.

 

▍Cultured Mammalian Cells

Reagent System Protocol

Step 1 - Sample Cells Harvesting
1. Transfer cultured mammalian cells (up to 10^⁷) to a sterile 1.5 ml microcentrifuge tube.
2. Centrifuge at 6,000 x g for 1 minute.
3. Remove the supernatant completely and resuspend the cells in 50 µl of the Buffer RL by pipetting the pellet.

Step 2 - Lysis
1. Add 300 µl of the Buffer CL to the resuspended cells from Step 1 and mix by vortex.
2. Incubate at 60°C for 10 minutes or until the sample lysate is clear. During the incubation, invert the tube every 3 minutes.
Optional Step: RNA Degradation (If RNA-free genomic DNA is required, perform this optional step.)
3. Add 5 µl of RNase A (10 mg/ml) to the sample lysate and mix by vortex. Incubate at room temperature for 5 minutes.

Step 3 - Protein Removal
1. Add 100 µl of the Buffer PO to the sample lysate and vortex immediately for 10 seconds.
2. Incubate on ice for 5 minutes.
3. Centrifuge at 14-16,000 x g for 3 minutes.
4. Transfer the supernatant to a clean 1.5 ml microcentrifuge tube.
Switch Step
◆If more pure DNA is required, please switch to Column System (DNA Pure) Protocol.

Step 4 - DNA Precipitation
1. Add 300 µl of Isopropanol to the sample from the Step 3 and mix well by inverting 20 times.
2. Centrifuge at 14-16,000 x g for 5 minutes.
3. Discard the supernatant and add 300 µl of 70% ethanol to wash the pellet.
4. Centrifuge at 14-16,000 x g for 3 minutes.
5. Discard the supernatant and air-dry the pellet for 10 minutes.

Step 5 - DNA Rehydration
1. Add 50-100 µl of the Buffer E and incubate at 60°C for 5-10 minutes to dissolve the DNA
pellet. During the incubation, tap the bottom of the tube to promote DNA rehydration.

Column System (DNA Pure) Protocol
* Add 60ml of the absolute ethanol to the Buffer W2 prior to initial use.
* Pre-heat the Buffer E to 60°C prior to use.

Step 1 - Sample Preparation
1. Add 400 µl of the Buffer BD to the sample from Step 3 Protein Removal and shake vigorously.

Step 2 - DNA Binding
1. Place a DG Column in a 2 ml Collection Tube.
2. Transfer the sample mixture from the previous step to the DG Column.
3. Centrifuge at 14-16,000 x g for 30 seconds.
4. Discard the flow-through and place the DG Column back in the same Collection Tube.

Step 3 - Wash
1. Add 400 µl of the Buffer W1 into the DG Column.
2. Centrifuge at 14,000 x g for 30 seconds.
3. Discard the flow-through and place the DG Column back into the same Collection tube.
4. Add 600 µl of the Buffer W2 (Ethanol added) into the DG Column.
5. Centrifuge at 14,000 x g for 30 seconds.
6. Discard the flow-through and place the DG Column back into the same Collection tube.
7. Centrifuge at 14,000 x g again for 2 minutes to remove residual Buffer W2.

Step 4 - DNA Elution
1. Place the dried DG column in a clean 1.5 ml microcentrifuge tube.
2. Add 50-200 µl of Pre-Heated Buffer E or TE (not provided) into the center of the column matrix.
3. Let it stand at 60°C for 5 minutes.
4. Centrifuge for 2 minutes at 14-16,000 x g to elute the purified DNA.

 

▍Gram-Negative Bacterial Cells

Reagent System Protocol

Step 1 - Sample Cells Harvesting
1. Transfer cultured bacterial cells (up to 10^⁹) to a sterile 1.5 ml microcentrifuge tube.
2. Centrifuge at 12,000 x g for 1 minute.
3. Remove the supernatant completely and resuspend the cells in 50 µl of the Buffer RL by pipetting the pellet.

Step 2 - Lysis
1. Add 300 µl of the Buffer CL to the resuspended cells from Step 1 and mix by vortex.
2. Incubate at 60°C for 10 minutes or until the sample lysate is clear. During the incubation, invert the tube every 3 minutes.
Optional Step: RNA Degradation (If RNA-free genomic DNA is required, perform this optional step.)
3. Add 5 µl of RNase A (10 mg/ml) to the sample lysate and mix by vortex. Incubate at room temperature for 5 minutes.

Step 3 - Protein Removal
1. Add 100 µl of the Buffer PO to the sample lysate and vortex immediately for 10 seconds.
2. Incubate on ice for 5 minutes.
3. Centrifuge at 14-16,000 x g for 3 minutes.
4. Transfer the supernatant to a clean 1.5 ml microcentrifuge tube.
Switch Step
◆If more pure DNA is required, please switch to Column System (DNA Pure) Protocol.

Step 4 - DNA Precipitation
1. Add 300 µl of Isopropanol to the sample from the Step 3 and mix well by inverting 20 times.
2. Centrifuge at 14-16,000 x g for 5 minutes.
3. Discard the supernatant and add 300 µl of 70% ethanol to wash the pellet.
4. Centrifuge at 14-16,000 x g for 3 minutes.
5. Discard the supernatant and air-dry the pellet for 10 minutes.

Step 5 - DNA Rehydration
1. Add 50-100 µl of the Buffer E and incubate at 60°C for 5-10 minutes to dissolve the DNA pellet. During the incubation, tap the bottom of the tube to promote DNA rehydration.

 

Column System (DNA Pure) Protocol

* Add 60ml of the absolute ethanol to the Buffer W2 prior to initial use.
* Pre-heat the Buffer E to 60°C prior to use.

Step 1 - Sample Preparation
1. Add 400 µl of the Buffer BD to the sample from Step 3 Protein Removal and shake vigorously.

Step 2 - DNA Binding
1. Place a DG Column in a 2 ml Collection Tube.
2. Transfer the sample mixture from the previous step to the DG Column.
3. Centrifuge at 14-16,000 x g for 30 seconds.
4. Discard the flow-through and place the DG Column back in the 2 ml Collection Tube.

Step 3 - Wash
1. Add 400 µl of the Buffer W1 into the DG Column.
2. Centrifuge at 14,000 x g for 30 seconds.
3. Discard the flow-through and place the DG Column back into the same Collection tube.
4. Add 600 µl of the Buffer W2 (Ethanol added) into the DG Column.
5. Centrifuge at 14,000 x g for 30 seconds.
6. Discard the flow-through and place the DG Column back into the same Collection tube.
7. Centrifuge at 14,000 x g again for 2 minutes to remove residual Buffer W2.

Step 4 - DNA Elution
1. Place the dried DG column in a clean 1.5 ml microcentrifuge tube.
2. Add 50-200 µl of Pre-Heated Buffer E or TE (not provided) into the center of the column matrix.
3. Let it stand at 60°C for 5 minutes.
4. Centrifuge for 2 minutes at 14-16,000 x g to elute the purified DNA.

 

 

▍Gram-Postive Bacterial Cells

Reagent System Protocol

Step 1 - Sample Cells Harvesting
1. Transfer cultured bacterial cells (up to 10^{^9}) to a sterile 1.5 ml microcentrifuge tube.
2. Centrifuge at 12,000 x g for 1 minute.
3. Remove the supernatant completely and resuspend the cells in 100 µl of lysozyme Buffer by pipetting the pellet.
4. Incubate at room temperature for 20 minutes.
 

Step 2 - Lysis

1. Add 300 µl of the Buffer CL to the resuspended cells from Step 1 and mix by vortex.
2. Incubate at 60°C for 10 minutes or until the sample lysate is clear. During the incubation, invert the tube every 3 minutes.
Optional Step: RNA Degradation (If RNA-free genomic DNA is required, perform this optional step.)
3. Add 5 µl of RNase A (10 mg/ml) to the sample lysate and mix by vortex. Incubate at room temperature for 5 minutes.

Step 3 - Protein Removal
1. Add 100 µl of the Buffer PO to the sample lysate and vortex immediately for 10 seconds.
2. Incubate on ice for 5 minutes.
3. Centrifuge at 14-16,000 x g for 3 minutes.
4. Transfer the supernatant to a clean 1.5 ml microcentrifuge tube.
Switch Step
◆If more pure DNA is required, please switch to Column System (DNA Pure) Protocol.

Step 4 - DNA Precipitation
1. Add 300 µl of Isopropanol to the sample from the Step 3 and mix well by inverting 20 times.
2. Centrifuge at 14-16,000 x g for 5 minutes.
3. Discard the supernatant and add 300 µl of 70% ethanol to wash the pellet.
4. Centrifuge at 14-16,000 x g for 3 minutes.
5. Discard the supernatant and air-dry the pellet for 10 minutes.

Step 5 - DNA Rehydration
1. Add 50-100 µl of the Buffer E and incubate at 60°C for 5-10 minutes to dissolve the DNA pellet. During the incubation, tap the bottom of the tube to promote DNA rehydration.

 

Column System (DNA Pure) Protocol

* Add 60ml of the absolute ethanol to the Buffer W2 prior to initial use.
* Pre-heat the Buffer E to 60°C prior to use.

Step 1 - Sample Preparation
1. Add 400 µl of the Buffer BD to the sample from Step 3 Protein Removal and shake vigorously.

Step 2 - DNA Binding
1. Place a DG Column in a 2 ml Collection Tube.
2. Transfer the sample mixture from the previous step to the DG Column.
3. Centrifuge at 14-16,000 x g for 30 seconds.
4. Discard the flow-through and place the DG Column back in the 2 ml Collection Tube.

Step 3 - Wash
1. Add 400 µl of the Buffer W1 into the DG Column.
2. Centrifuge at 14,000 x g for 30 seconds.
3. Discard the flow-through and place the DG Column back into the same Collection tube.
4. Add 600 µl of the Buffer W2 (Ethanol added) into the DG Column.
5. Centrifuge at 14,000 x g for 30 seconds.
6. Discard the flow-through and place the DG Column back into the same Collection tube.
7. Centrifuge at 14,000 x g again for 2 minutes to remove residual Buffer W2.

Step 4 - DNA Elution
1. Place the dried DG column in a clean 1.5 ml microcentrifuge tube.
2. Add 50-200 µl of Pre-Heated Buffer E or TE (not provided) into the center of the column matrix.
3. Let it stand at 60°C for 5 minutes.
4. Centrifuge for 2 minutes at 14-16,000 x g to elute the purified DNA.

 

 

▍Fungus Cells

Reagent System Protocol

Step 1 - Sample Cells Harvesting
1. Transfer fungus cells (up to 10^{^8}) to a sterile 1.5 ml microcentrifuge tube.
2. Centrifuge at 6,000 x g for 5 minutes.
3. Remove the supernatant completely and resuspend the cells in 600 µl of sorbitol Buffer by pipetting the pellet.
4. Add 200 U of lyticase or zymolase. Incubate at 30°C for 30 minutes.
5. Centrifuge the mixture for 10 minutes at 2,000 x g to harvest the spheroplast.
6. Remove the supernatant completely and resuspend the cells in 50 µl of the Buffer RL by pipetting the pellet.
 

Step 2 - Lysis
1. Add 300 µl of the Buffer CL to the resuspended cells from Step 1 and mix by vortex.
2. Incubate at 60°C for 10 minutes or until the sample lysate is clear. During the incubation, invert the tube every 3 minutes.
Optional Step: RNA Degradation (If RNA-free genomic DNA is required, perform this optional step.)
3. Add 5 µl of RNase A (10 mg/ml) to the sample lysate and mix by vortex. Incubate at room temperature for 5 minutes.
 

Step 3 - Protein Removal
1. Add 100 µl of the Buffer PO to the sample lysate and vortex immediately for 10 seconds.
2. Incubate on ice for 5 minutes.
3. Centrifuge at 14-16,000 x g for 3 minutes.
4. Transfer the supernatant to a clean 1.5 ml microcentrifuge tube.
Switch Step
◆If more pure DNA is required, please switch to Column System (DNA Pure) Protocol.
 

Step 4 - DNA Precipitation
1. Add 300 µl of Isopropanol to the sample from the Step 3 and mix well by inverting 20 times.
2. Centrifuge at 14-16,000 x g for 5 minutes.
3. Discard the supernatant and add 300 µl of 70% ethanol to wash the pellet.
4. Centrifuge at 14-16,000 x g for 3 minutes.
5. Discard the supernatant and air-dry the pellet for 10 minutes.

Step 5 - DNA Rehydration
1. Add 50-100 µl of the Buffer E and incubate at 60°C for 5-10 minutes to dissolve the DNA pellet. During the incubation, tap the bottom of the tube to promote DNA rehydration.

 

Column System (DNA Pure) Protocol

* Add 60ml of the absolute ethanol to the Buffer W2 prior to initial use.
* Pre-heat the Buffer E to 60°C prior to use.

Step 1 - Sample Preparation
1. Add 400 µl of the Buffer BD to the sample from Step 3 Protein Removal and shake vigorously.

Step 2 - DNA Binding
1. Place a DG Column in a 2 ml Collection Tube.
2. Transfer the sample mixture from the previous step to the DG Column.
3. Centrifuge at 14-16,000 x g for 30 seconds.
4. Discard the flow-through and place the DG Column back in the 2 ml Collection Tube.

Step 3 - Wash
1. Add 400 µl of the Buffer W1 into the DG Column.
2. Centrifuge at 14,000 x g for 30 seconds.
3. Discard the flow-through and place the DG Column back into the same Collection tube.
4. Add 600 µl of the Buffer W2 (Ethanol added) into the DG Column.
5. Centrifuge at 14,000 x g for 30 seconds.
6. Discard the flow-through and place the DG Column back into the same Collection tube.
7. Centrifuge at 14,000 x g again for 2 minutes to remove residual Buffer W2.

Step 4 - DNA Elution
1. Place the dried DG column in a clean 1.5 ml microcentrifuge tube.
2. Add 50-200 µl of Pre-Heated Buffer E or TE (not provided) into the center of the column matrix.
3. Let it stand at 60°C for 5 minutes.
4. Centrifuge for 2 minutes at 14-16,000 x g to elute the purified DNA.