Do you heat Tris HCl when you elute from silica?
Posted 20 January 2011 - 07:52 AM
Well, it's happening to me. I've been using the Qiaquick and MinElute kits from Qiagen for years and usually heat they EB buffer (which is Tric HCl) when I elute. Then recently I came across protocols where they didn't heat and wondered if heating was wise. I can't remember where I got the idea from. I've probably seen this in a kit (I think the MiniBlood kit uses hot AE to elute), but when I read the manual from the MinElute, they don't advise to heat. Only to repeat the elution a second time if we want to increase the DNA yiel a bit.
Now I wonder if using EB at 70 degrees will hurt, help or do nothing at all. What do you think?
Question number two, also related to elution and silica. The most recent protocols of my field advise to add 0.05% Tween to the EB buffer when eluting your DNA from the silica. Adding a detergent to my extract doesn't sounds like a good idea to me, especially since I'll use enzymes in the next steps, but the guys who published that are really good. Any idea?
Posted 20 January 2011 - 11:10 AM
Posted 20 January 2011 - 11:17 AM
I regularly did it in such kits with EB/AE buffers, because DNA amounts are always low (tiny insects).
One must presume that long and short arguments contribute to the same end. - Epicurus
...except casandra's that belong to the funniest, most interesting and imaginative (or over-imaginative?) ones, I suppose.
Posted 20 January 2011 - 12:44 PM
It's a bit weird that they mention heating in the extraction kit's troubleshooting chapter and not in the MinElute one.
Not very logic if you ask me .
Anywayyy, I'll take your word and go on heating my buffer AND I'll keep the Tween. THANK YOU.