I have some sample that I have to re-purify and some samples to isolate DNA de novo. In both cases I have to use RNAase to remove RNA. I tried with 1.5 ul of RNAase A (4 mg/ml) but the RNA is still there when I run an agarose electrophoresis. Wich volume do you recommend to use with a RNAase of that concentration. I work with wild rats liver. Thank you all!
Ignacio