"BEST" PCR--从质粒上扩增DNA的PCR条件

BEST" PCR conditions for amplifying DNA from plasmids

25 ng linear template (~6.5 kb) 50 pmol each primer 100 pmol each dNTP 1X Promega Taq buffer (no Mg++) 1.5 mM MgCl2 1 U Taq DNA polymerase in 50 ul final

92°C / 2' 92°C / 30" 50°C or 55°C (depends on Tm of oligos) /30" 72°C / about 2' per kb Go to 2, 15 times 70°C/ 8' 4°C...hold.

Takes about 2 hours to complete. If you are using Pfu turbo, use its buffer (Mg already added) and decrease elongation to 1'/kb DNA. Note that this DNA is blunt ended and can be cloned directly (no purification necessary) into a phosphorylated vector. Taq made DNA needs to be AT vector cloned. For PCR from yeast genomic DNA, good DNA is important. Grow cells in Ade (red pigment kills PCR) and if you have trouble, you can gene clean the DNA.