by adding 0.4-0.5 vol of ethanol to 1 vol of a solution in 2 m licl of nucleic acids ( containing mainly dna , 4s , 5s , 7s , and viroid rnas ) , 85 % of the dna and 75 % of the 4s rna remained in solution , from where they could be recovered by increasing the ethanol concentration , whereas almost all 5s , 7s , and viroid rnas precipitated .
C0028606
nucleic acids
C0012854
dna