Skatebro:Digestion: Difference between revisions

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[[Skatebro:Project08]]


==Tips==
*Keep all buffers/enzymes on ice block for the entire process
*Do calculations based on fresh dna spec reading
*50 μL total volume
*need ~800ng DNA to cut!! (yes thats a lot)
*Digest your PCR insert and backbone separately
*Use Dpn1 ''only'' if you are cutting a PCR product
*Incubate at 37c for 2-4 hours and heat shock for 20 mins at 80c
*Don't forget!: do a purification and run a gel of digest ~before ligation
==Controls==
*Digest a control part in parallel to check that digest is working correctly
*Run cut, cleaned-up dna on a gel
==Steps==
#Add in order: (50μL little pcr-sized tube)
#*?? μL water to bring the total volume to 50μL
#*5 μL Buffer 2 (quick vortex first)
#*.5 μL BSA (quick vortex first)
#*?? μL DNA (whatever neccesary to get 800 ng -- good idea to do a fresh nanodrop of your sample and then make this calculation)
#*.5 μL Pst1 and .5 μL EcoR1 (for example)
#*.5 μL Dpn 1 (''only'' if digesting a PCR product)
#Incubate at 37c for 2 hours (1 minimum and 6 maximum)
#Heat shock for 20 mins at 80c to heat inactivate the enzyme, then store at 4c forever
#Do a purification (elute in 30μL) just like a pcr clean up
#Run a gel to check this step ~before moving on to ligation reaction

Latest revision as of 03:07, 9 February 2008