| Autor: |
Meldrum, R A, Shall, S, Trentham, D R, Wharton, C W |
| Jazyk: |
angličtina |
| Rok vydání: |
1990 |
| Předmět: |
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| Popis: |
Caged dideoxyribosylthymine triphosphate, dideoxyadenosine triphosphate and arabinosylcytosine triphosphate were prepared in high yield by reaction with 1-(2-nitrophenyl)diazoethane at pH 4 and room temperature for 24 h. Synthesis of caged alpha-32P-labelled dideoxyadenosine triphosphate (approx. 5000 Ci/mmol) in 85% yield was achieved by a modification of the method used for the synthesis of the unlabelled compounds. ATP was shown to be an excellent buffer in the synthesis of alpha-32P-labelled material, and in caged form to be an effective carrier in h.p.l.c. purification. Preparative h.p.l.c. was used to achieve purification of unlabelled caged compounds to greater than 98% purity and 32P-labelled material to 97% purity. Photolysis of unlabelled and 32P-labelled caged compounds by using XeF-excimer laser irradiation at 351 nm was characterized by using difference spectrophotometry and h.p.l.c. analysis. The stability of caged dideoxyadenosine [a-32P]triphosphate in the presence of cultured mammalian cells was evaluated; the adenosine derivative is essentially stable for 1 h. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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