Materials:
![]() | 10X restriction enzyme buffer (see manufacturer's recommendation) |
![]() | DNA |
![]() | sterile water |
![]() | restriction enzyme |
![]() | phenol:chloroform (1:1) |
Add the following to a microfuge tube:
![]() | 2 μl of appropriate 10X restriction enzyme buffer |
![]() | 0.1 to 5 μg DNA |
![]() | sterile water to a final volume of 19 μl (Note: These volumes are for analytical digests only. Larger volumes may be necessary for preparative digests or for chromosomal DNA digests. |
Add 1 to 2 μl (3 to 20 units) enzyme and mix gently. Spin for a few seconds in microfuge.
Incubate at the appropriate temperature (usually 37EC) for 1 to 2 hours.
Run a small aliquot on a gel to check for digestion.
If the DNA is to be used for another manipulation, heat inactivate the enzyme (if it is heat labile) at 70EC for 15 min, phenol/chloroform extract and ethanol precipitate, or purify on Qiagen DNA purification column.