Ammonium acetate solution, 7.5 M molecular biology grade

DNase/RNase not detected. 0.2 µm filtered. 7.5 M stock solution (ammonium acetate, cat. no. 39750: 578.1 g/l) for precipitation of DNA. Short oligonucleotides and free dNTPs do not coprecipitate with DNA when precipitated with NH4OAc. Two consecutive precipitation steps are enough to remove 99 % of free dNTPs.