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{AutoGenprep
245T}
I.
Purpose: To extract genomic
DNA from animal tissue.
II.
Chemical
Principal: Modified CTAB/Proteinase
K digestion & Organic extraction method.
III.
Protocol Parameters:
A.
Sample
Volume*1: 5-10mg (Mouse liver, lung, brain and uterus)
10-15mg (Mouse tail, heart and testis)
*1
Optimal starting volume depends on type of animal and tissue.
B.
Maximum
Number of Samples: 24 samples per run.
C.
Processing
Time: 1.8 hours for 12 samples*2
2.5 hours for 24 samples*2
*2
This includes drying and resuspending DNA steps.
D.
Yield*3: 3~6 μg of
gDNA / 1mg of liver
0.8~2
μg
of gDNA / 1mg of other types of tissues.
*3
Measured by OD260 value. Actual yield may vary, depending on the
condition and type of tissue sample.
E.
Quality:
Typical OD260/280 values in water are
1.70 - 1.95
The DNA can be used directly in downstream processes such as
PCR, real time PCR
and restriction endonuclease digestions.
IV.
Running the Protocol:
A.
Load
Reagents and Samples
B.
Select a
Protocol
C.
Enter
Number of Samples
D.
Start
the Run
V. Example of genomic DNA:
A. Extracted genomic DNA:
Gel Electrophoresis:
Sample: Approx. 0.5-3.0 ug of genomic DNA was loaded onto the gel
Gel: 0.7% agarose gel, 1xTBE, 50V x 1.5hr
Mouse tail
Mouse Liver 
Mouse Lung 
B. Typical Yield and Purity+
|
Tissue Type |
Tail |
Brain |
Heart |
Lung |
Liver |
Testis |
Uterus |
|
Sample weight (mg) |
15 |
10 |
15 |
5 |
5 |
20 |
10 |
|
Yield (μg) |
13 |
21 |
26 |
5 |
30 |
50 |
9 |
|
OD260/280 |
1.93 |
1.85 |
1.88 |
1.74 |
1.85 |
1.90 |
1.80 |
|
+ Actual yield
and purity may vary, depending on the condition of original tissue
and digested sample. |
VI.
Extraction
and Purification Process:
| Process Site |
Purpose |
System Process |
| 1. Manual |
Digest Tissue |
Dissolve Proteinase K in Reagent
TD-S0*, at 0.4mg/ml concentration, add 350μl
to sample and incubate at 50-60C
overnight. |
| 2. Automated |
Remove Protein |
Add Reagent TD-S1* and mix. |
| 3. Automated |
Collect DNA |
Add Reagent TD-S2* and mix.
Centrifuge to pellet protein and cellular debris and transfer
supernatant to new tube. |
| 4. Automated |
Precipitate DNA |
Add Reagent TD-S3*, mix,
centrifuge to precipitate DNA, and discard supernatant. |
| 5. Automated |
Wash DNA |
Add Reagent TD-S4/5*, mix,
centrifuge and discard supernatant. Repeat twice. |
| 6. Automated |
Dry DNA |
Centrifuge tube to dry DNA
sample. |
| 7. Automated |
Resuspend DNA |
Add Reagent TD-S6*. |
| * All reagents
and plastics are sold as a complete extraction kit for Tissue
DNA on the AutoGenprep 245T. |
|