Why do it get a white precipitate after renaturing dsRNA for RNAi?

I am using a T7 Megascript RNA kit from Invitrogen. I transcribe overnight at 37˚C, treat with DNase, phenol/chloroform extract, precipitate with isopropanol, then denature 30mins at 70˚C and let...

11 November 2016 5,257 3 View