Possibilities of enzymic synthesis of nucleoside-.5'-triphosphates-14CC(U) of adenine, guanine, cytosine and uracil of high spec@ activity and radiochemical purity by means of a purijied enzyme isolatedfrom Escherichia coli B were studied. The efect of enzyme concentration in the reaction mixture in
NEW Possibilities of preparative synthesis of radioactive nucleotides V. Enzyme synthesis of tritium labelled uridine 5′-triphosphate in high yield
✍ Scribed by J. Filip; L. Bohacek; J. Vesely; A. Cihak
- Publisher
- John Wiley and Sons
- Year
- 1974
- Tongue
- French
- Weight
- 248 KB
- Volume
- 10
- Category
- Article
- ISSN
- 0022-2135
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✦ Synopsis
Abstract
Growth of Escherichia coli B in the presence of sub−bacteriostatic concentration of various compounds results in the enhancement of activity of enzymes catalyzing the transformation of uridine to its 5′‐phosphates. Partially purified extracts of E. coli cultivated in the presence of 1×10^−5^M 5‐azacytidine were applied for the preparative synthesis of tritium‐labelled uridine 5′‐triphosphate. Yield of the newly formed nucleotide was about 90% and was higher during the short‐term incubation using enzyme extract from the treated cells than that from controls.
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