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. 1967 Jul;104(1):254-7.
doi: 10.1042/bj1040254.

Isolation of deoxyribonucleic acid from mammalian tissues

K S Kirby, E A Cook

Isolation of deoxyribonucleic acid from mammalian tissues

K S Kirby et al. Biochem J. 1967 Jul.

Abstract

1. DNA has been isolated from different mammalian tissues. The DNA preparations were free from RNA, protein and polysaccharides and have a similar range of sedimentation coefficients (approx. 24s). 2. Protein was removed by a two-stage extraction with a phenol-cresol mixture by using a detergent with 4-aminosalicylate in the first stage and sodium chloride in the second. 3. Polysaccharides remained in solution when DNA was precipitated with 2-butoxyethanol in the presence of 0.5m-sodium chloride and 1.5m-sodium benzoate. 4. Ribosomal RNA was removed by precipitation in the presence of 3m-sodium chloride at 0 degrees , when DNA remained soluble.

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