The isolation of nucleic acids from woody tissue using dimethyl sulfoxide

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Abstract
A procedure is described for the isolation of nucleic acids from apple bark tissue using dimethyl sulfoxide. Nucleic acids isolated by this method are high in yield, and exhibit a high degree of purity as evidenced by their spectra. Experimental evidence is given to show that extraction of the tissue with dimethyl sulfoxide before the extraction of nucleic acids removes protein and pigments. Little or no ribonuclease activity could be detected in apple bark tissue after extraction with dimethyl sulfoxide. Ribonuclease activity was shown to be strongly inhibited by high concentrations of dimethyl sulfoxide.

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