## Effect of Specific Nuclease and Phosphoesterase on Desoxyribonucleic Acid Prepared with the Use of Strong Sodium Hydroxide (Method of Levene ).--C~IARLES A. ZITTLE. Desoxyribonucleic acid prepared under mild conditions is readily hydrolyzed by specific nuclease so that it becomes soluble in HCI
Enzymatic hydrolysis of desoxyribonucleic acid prepared with the use of strong sodium hydroxide
โ Scribed by Charles A. Zittle
- Publisher
- Elsevier Science
- Year
- 1948
- Tongue
- English
- Weight
- 160 KB
- Volume
- 245
- Category
- Article
- ISSN
- 0016-0032
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โฆ Synopsis
Hydroxide.--CHARLES A. ZITTLE. It was previously reported (1) that desoxyribonucleic acid (DNA) prepared under mild conditions (method of Hammarsten) (2) was readily hydrolyzed by specific nuclease so that it became soluble in HC1, whereas DNA prepared with the use of hot 1.25 N NaOH (method of Levene) (3) was not hydrolyzed by the nuclease. Further study has shown that under the proper conditions the alkali-treated DNA can be slowly hydrolyzed by the nuclease at a rate about 20 per cent. of that of DNA (Hammarsten). The previously reported .erroneus conclusion that DNA (Levene) could not be hydrolyzed was in consequence of this low rate of hydrolysis and the instability of the enzyme under the conditions used.
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The 1H and 13C NMR chemicals shifts of the various saturated and unsaturated timers obtained by acid or enzymatic depolymerisation of homopolymeric blocks of alginates are reported. In addition, 13C NMR chemical shifts are assigned for several saturated oligomers of higher polymerisation degrees. Br