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The mechanism of action of the deoxyribonuclease of rat liver chromatin on DNA


, : The mechanism of action of the deoxyribonuclease of rat liver chromatin on DNA. Biokhimiia 41(1): 119-123

A mechanism of action of DNAase, isolated by chromatin extraction with 0.4 M NaCl, on DNA is described. The enzyme is an endonuclease, it does not require the presence of double-stranded regions in the DNA molecule, does not distinct single-stranded breaks in DNA, and it preferably attacks single-stranded DNA. It hydrolyses DNA for 3'-phosphodiester bonds to octane nucleotides which are resistant to the enzyme activity. The action of the enzyme on DNA does not depend on the position of terminal phosphates. Chromatin DNAase is not specific to DNAs from different origins.

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PMID: 1276252


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