pcr cycle

[Heinz-Juergen Schaefers]

> 
> > I do not understand which reason is   95 C for 5 minutes for first
> >cycle  and 72 C for 10 minutes for last cycle
> >Does any paper explain that ? Or somebody can explain that ? Thank a lot
> >
> >Shi-Jye Chu
> 

Hi Shi-Jye Chu!

The 95 C for the first cycle is to have totaly single stranded DNA...
the 72 C for the last cycle is to allow the Taq polimerase to complete the work
on the actual strand...
both is to be on the secure side....the times may be shortened to 2 minutes for
the first 95 C step and to 7 minutes for the last 72 C step...

bye
	Heinz
---
Dipl. Biol. Heinz-Juergen Schaefers
Universitaet Erlangen-Nuernberg / Med. Klinik IV / Nephrologisches Forschungslaborabor
Loschgestr. 8, D-91054 Erlangen, Germany
E-mail: dienstl.: mfm434 at rzmail.uni-erlangen.de / priv.: h-j.schaefers at erlangen.netsurf.de