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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.